[AINews] Google I/O 2026：Gemini 3.5 Flash、Omni（動画用 NanoBanana）、Spark（背景エージェント）、Antigravity 2.0 の発表

The full keynote livestream was 2 hours, but as usual, The Verge has the best supercut down to 30 mins, which is very worthwhile to get a narrative sense:

The mainline Gemini 3.5 Flash is GA today (very nice compared to some staged rollouts) and is sold as a decent step up even compared to 3.1 Pro, with 3.5 Pro coming next month. Perhaps more impressive were the Gemini Live (Voice) and Omni (Video) and Google Pics/Flow (Images/VFX/music) modalities, where Google demonstrated industry leading capabilities and latency, all presumably made possible by industry leading hardware and models.

Per longstanding tradition at every bigtech keynote these days, Google also showed off some smart glasses tech, which seems a little more likely to be seen on the street than many prior iterations from both Google and their peers.

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Google used I/O to reposition Gemini as both a consumer AI surface and a developer/agent platform, with three core technical announcements: Gemini 3.5 Flash for fast agentic/coding workloads, Gemini Omni for multimodal generation/editing starting with video, and a broader Antigravity agent stack spanning desktop/CLI/SDK/API. Official posts emphasized scale — Google says it now processes over 3.2 quadrillion tokens/month, up 7x YoY from 480T/month, while the Gemini app has 900M+ monthly users and is available in 230+ countries and 70+ languages (Google, Google, GeminiApp). The most technically substantive release was Gemini 3.5 Flash, framed by Google as its strongest agentic/coding model yet, GA immediately, with 1M-token context, 65k max output, 4 thinking levels (“minimal/low/medium/high”), and “thought preservation” across turns (GoogleDeepMind, Google, _philschmid). Google paired that with Gemini Omni, a new family combining Gemini reasoning with generative media, initially via Omni Flash, capable of taking text/image/video/audio inputs and producing video edits/generation in Gemini, Flow, Shorts, and later APIs (GoogleDeepMind, Google, GeminiApp). Around those models, Google launched or expanded Antigravity 2.0 desktop, CLI, SDK, Managed Agents in the Gemini API, Search-native generative UI/coding, Gemini Spark background agents on cloud VMs, and a long list of Gemini-app/Workspace/commerce/media integrations (Google, Google, Google).

Facts vs. opinions

Facts / directly claimed by official or third-party benchmark sources

Google says it now processes 3.2 quadrillion tokens/month, up from 480 trillion a year earlier (Google).

Google says Gemini has 900M+ monthly users (Google).

Google says Gemini 3.5 Flash is GA today across Gemini app, Search AI Mode, Gemini API, AI Studio, Antigravity, Android Studio, and enterprise surfaces (Google, GeminiApp).

Google says Gemini 3.5 Flash has 1M context, 65k max output, 4 thinking levels, and “thought preservation” across turns ( _philschmid).

Google says 3.5 Flash beats Gemini 3.1 Pro on Terminal-Bench 2.1, GDPval-AA, and MCP Atlas (GoogleDeepMind, Google).

Google says 3.5 Flash runs 4x faster than comparable frontier models, and up to 12x faster in Antigravity (Google, JeffDean).

Independent benchmarker Artificial Analysis reports Gemini 3.5 Flash scores 55 on its Intelligence Index, +9 vs Gemini 3 Flash, at >280 output tok/s, with MMMU-Pro 84%, GDPval-AA Elo 1656, and pricing of $1.50 / $9.00 per 1M input/output tokens; it also reports the model is 5.5x costlier to run than Gemini 3 Flash on its suite and 75% costlier than Gemini 3.1 Pro (ArtificialAnlys).

Arena reports Gemini 3.5 Flash reached #9 overall in Text Arena and #9 in Code Arena: Frontend, scoring 1507, a +70 jump over Gemini 3 Flash, and becoming the top score in its price tier (arena).

Google says Gemini Omni Flash is available in Gemini/Flow today for paid users, in Shorts/Create starting this week for free, and via APIs in coming weeks (Google).

Google says Spark runs on dedicated Google Cloud virtual machines, allowing long-running tasks while user devices are closed (Google).

Google claims an Antigravity + Gemini 3.5 Flash demo built a functioning OS in 12 hours using 93 parallel sub-agents, 15k+ model requests, 2.6B tokens, and < $1K API credits (Google).

Google says Search will use Antigravity + 3.5 Flash to generate custom visual tools/simulations on the fly (Google).

Opinions / interpretations / skepticism

Positive takes: “Google is back,” “insane evals for a Flash model,” “world model towards AGI,” “mind blowing” for Search + Antigravity, etc. (kimmonismus, Kseniase_, demishassabis).

Neutral caution: some posters explicitly avoided overhyping due to self-reported benchmarks and noted pricing/perf concerns (scaling01, simonw).

Negative/skeptical takes focused on:

Price inflation relative to earlier Flash models (enricoros).

Comparisons where GPT-5.5-medium may be smarter/cheaper/faster end-to-end (scaling01, scaling01).

Benchmark caveats such as weak TerminalBench-Hard, mediocre MRCR / ARC-AGI-2, or not clearly beating Kimi/GLM on some slices (scaling01, teortaxesTex, scaling01).

Product naming/UX confusion around Gemini CLI vs Antigravity CLI and broader interface design criticism (zachtratar, kchonyc, teortaxesTex).

Gemini 3.5 Flash: the main technical release

Official positioning

Google/DeepMind repeatedly described Gemini 3.5 Flash as the company’s strongest model yet for agents and coding, not its absolute flagship intelligence model. It’s meant to sit on the high-speed, high-utility part of the Pareto frontier, powering both Google products and developer workloads (GoogleDeepMind, Google, SundarPichai).

Technical details and metrics

From Google and affiliated posts:

GA availability now (Google)

1M token context window

65k max output tokens

Thinking levels: minimal, low, medium (new default), high

Thought preservation across multi-turn conversations

Text output

Input modalities: text, image, video, speech per Artificial Analysis ( _philschmid, ArtificialAnlys)

Pricing: $1.50 / 1M input, $9.00 / 1M output, 90% discount on cached input (scaling01, ArtificialAnlys)

Official benchmark claims:

Terminal-Bench 2.1: 76.2%

GDPval-AA: 1656 Elo

MCP Atlas: 83.6%

Google-quoted multimodal result: MMMU-Pro 83.6% in one engineer post; Artificial Analysis reports 84%, highest recorded on its setup (koraykv, ArtificialAnlys)

Speed claims:

Google marketing claim: 4x faster than comparable frontier models (Google)

In Antigravity, Google says it is up to 12x faster (JeffDean, scaling01)

Artificial Analysis observed >280 output tok/s

Some discussion cited ~867 tok/s in Antigravity-specific optimized serving (scaling01, scaling01)

Third-party evaluation:

Artificial Analysis says 3.5 Flash is the leader on the intelligence-vs-speed Pareto frontier, but the economics are notably worse than prior Flash:

Intelligence Index 55

+9 over Gemini 3 Flash

Hallucination rate reduced to 61%, a 31-point drop vs Gemini 3 Flash on its omniscience setup

GDPval-AA 1656 Elo

5.5x costlier than Gemini 3 Flash to run on its benchmark suite

75% costlier than Gemini 3.1 Pro on the same suite (ArtificialAnlys)

Arena:

#9 Text Arena

#9 Code Arena: Frontend

1507 score, +70 over Gemini-3 Flash

Better than Gemini 3.1 Pro across categories in its frontend coding eval (arena, arena)

Implications

The notable shift is that Google appears to be using a “Flash” label for a model that, in prior cycles, would have been described more like a high-end product model optimized for deployment rather than simply a cheap lightweight tier. Several posters called this out directly, arguing Flash is becoming more expensive and possibly absorbing former Pro territory (enricoros, simonw).

The strongest technical signal is not “best absolute benchmark model,” but:

material agentic gains

extreme serving speed

deep integration into product surfaces

tooling built around subagents and long-horizon execution

That makes 3.5 Flash strategically important even if some competitors still win on raw price-adjusted intelligence in certain third-party comparisons.

Gemini Omni: multimodal generation/editing as “create anything from any input”

What Google announced

Google introduced Gemini Omni as a new family merging Gemini reasoning/world knowledge with Google’s generative media stack, starting with video creation and editing. Official messaging described it as “create anything from any input,” but current rollout is narrower:

Inputs: text, images, audio, video

Initial output emphasis: video

Product availability: Gemini app, Flow, YouTube Shorts/Create, later APIs

Current shipping model: Gemini Omni Flash (GoogleDeepMind, Google, Google)

Google/DeepMind claims:

Better world understanding

More robust physics

Multi-turn editing where scene/character consistency is retained

Ability to “reimagine” user video footage with conversational edits (Google, Google)

Rollout specifics:

Paid Gemini users globally in app/Flow “today”

YouTube Shorts/Create rolling out “starting this week” at no cost

APIs for developers/enterprise in coming weeks (Google, GeminiApp)

Perspectives

Supportive: users and Google employees described Omni as a major quality step, especially for video editing and consistency (joshwoodward, fofrAI, osanseviero).

Strategic interpretation: several posters framed Omni as evidence Google is investing in world models and embodied/physical priors, not just text/code competition (demishassabis, jparkerholder, kimmonismus).

Skepticism: some UI/output examples drew criticism for looking like “B-tier video game interface” or too polished/template-like (teortaxesTex, shlomifruchter).

Context

Omni matters less as “yet another video model” and more as Google’s attempt to unify:

multimodal understanding,

media editing,

world grounding,

agent interfaces,

and eventually any-input/any-output generation.

This aligns with DeepMind’s long-running world-model agenda and Google’s product distribution advantage.

Antigravity: Google’s agent OS, not just a coding assistant

A major underappreciated I/O theme was that Google is no longer presenting agents as a thin wrapper around a chat model. Antigravity is becoming the execution substrate.

What launched / expanded

Antigravity 2.0 desktop app: agent-first desktop with core conversations, artifacts, multi-agent orchestration (Google, Google)

Antigravity CLI (Google, Google)

Antigravity SDK (Google)

Managed Agents in Gemini API: single API call gives an agent plus hosted Linux sandbox; supports Bash/Python/Node, files, browsing, custom markdown-defined skills, repo/GCS mounts (Google, GoogleAIStudio, _philschmid)

Integrations with AI Studio, Android, Firebase, Workspace, web (Google, Google)

One-click export from AI Studio to Antigravity (Google)

Native Android app generation in AI Studio / Android support in Antigravity (Google, AndroidDev)

Technical signaling

Google’s own demos centered on parallel sub-agents, hosted execution, high-frequency iterative loops, and artifact-oriented workflows. Jeff Dean explicitly described 3.5 Flash as a strong engine for “deploy sub-agents that collaborate, run high-frequency iterative loops, and solve real-world problems at scale” (JeffDean).

The marquee proof point:

OS built in 12h

93 parallel sub-agents

15k+ requests

2.6B tokens

< $1K credits (Google)

Even if this is mostly a stage-managed benchmark/demo, it reveals the architecture Google wants developers to adopt: many fast agents over one slow monolithic run.

Reactions

Positive: this is Google’s answer to Codex/Claude Code/OpenClaw/Hermes-style workflows, with a stronger infra story (iScienceLuvr, theo).

Critical: branding and product sprawl remain confusing; some users aren’t sure whether they should use Gemini CLI or Antigravity CLI, and Google’s design choices drew complaints (kchonyc, zachtratar, teortaxesTex).

Search, Gemini app, and consumer agents

Search

Google announced a redesigned AI-powered Search box, multimodal query support, and the most ambitious consumer-facing move: Search generating custom visual tools and simulations on the fly using Antigravity + Gemini 3.5 Flash (Google, Google).

It also previewed information agents in Search:

persistent monitoring tasks

web/news/social/real-time signals

synthesized updates with links and actions

rolling out to Pro/Ultra this summer (Google, Google)

This is a notable strategic shift: Search moves from retrieval/ranking to background agentic monitoring + generated applets.

Gemini app

Consumer Gemini updates included:

new “Neural Expressive” design language (Google)

inline/instant Gemini Live voice (Google)

Daily Brief personalized digest from inbox/calendar/tasks (Google, GeminiApp)

Gemini Spark as a 24/7 personal AI agent on cloud VMs, checking with users before major actions (Google, GeminiApp)

macOS app + upcoming Spark/voice desktop workflows (Google, GeminiApp)

Pricing / subscriptions

Google introduced a new pricing ladder:

new $100/month plan

top-tier Ultra cut from $250 to $200/month (Google, GeminiApp)

This reads as a more aggressive bid for premium power users, especially coders and creators.

Trust, provenance, and standards

Google pushed SynthID across Search, Gemini, Chrome, and hardware/media surfaces, and announced partnerships with OpenAI, NVIDIA, Kakao, and ElevenLabs to bring SynthID to their generated content (Google, Google).

That is one of the more consequential standards moves from I/O:

it gives Google a shot at owning part of the provenance layer for generative media;

notably, OpenAI separately announced support for checking OpenAI-generated images via SynthID watermark + C2PA credentials (OpenAI).

This was less flashy than Omni/3.5 Flash, but likely more durable if provenance becomes mandatory infrastructure.

Google’s science and world-model angle

Several I/O items reinforced that Google does not want to compete only on coding/chat:

Gemini for Science: Literature Insights, Hypothesis Generation, Computational Discovery (GoogleDeepMind, Google)

Nature publication links around ERA / Co-Scientist (GoogleResearch, GoogleResearch)

Project Genie + Street View grounding, using ~20 years of maps imagery to create interactive real-location simulations (Google, poolio, bilawalsidhu)

This broader context explains why some observers interpreted Omni as “world-model progress” rather than just a content tool (demishassabis, jparkerholder).

Different opinions

Bullish / supportive

Gemini 3.5 Flash viewed as a major leap for a speed-tier model, especially on agentic coding (kimmonismus, SundarPichai).

Search + Antigravity seen as potentially transformative because Google can deploy generated UI/tools at enormous scale (Kseniase_, TheTuringPost).

Omni praised for editing quality and for hinting at a deeper world-model roadmap (joshwoodward, kimmonismus).

Skeptical / opposing

Concern that Google is leaning on self-reported benchmarks, and independent comparisons still leave room for competitors (scaling01).

Concern that “Flash” is no longer cheap enough to justify the name; pricing has climbed sharply from prior Flash generations (enricoros, simonw).

Some believed GPT-5.5-medium still dominates on a combined smart/cheap/latency basis (scaling01).

Some benchmark slices imply unevenness — e.g. poor TerminalBench-Hard or middling reasoning metrics despite strong agentic numbers (scaling01, teortaxesTex).

Neutral / analytical

Artificial Analysis gave the strongest balanced take: excellent speed-intelligence frontier position, substantial agentic gains, but materially worse cost than prior Flash and even higher than 3.1 Pro on their end-to-end suite (ArtificialAnlys).

Arena’s data also supports a “real improvement, not just marketing” conclusion, especially for frontend/code tasks, without claiming category dominance (arena).

Why this matters

Google now has a coherent deployment story.

Earlier Gemini cycles often felt benchmark-heavy and product-fragmented. At I/O, Google tied model, infra, tools, APIs, consumer surfaces, and enterprise rollout together.

The center of gravity is shifting from chatbot UX to agent execution.

The important primitives were not just model IQ: they were subagents, hosted sandboxes, long-running tasks, generated artifacts, and integration with Search/Workspace/Android.

Gemini 3.5 Flash suggests “fast enough to orchestrate many agents” may matter more than max benchmark score.

For coding and tool use, throughput and latency are increasingly product-defining.

Omni reveals Google’s differentiation thesis.

Google is betting on multimodal/world-grounded systems rather than purely text-centric competition.

Trust/provenance is becoming platform infrastructure.

SynthID partnerships with OpenAI/NVIDIA/ElevenLabs/Kakao suggest some convergence around content-auth provenance layers.

The biggest unresolved question is economics.

Technically strong or not, 3.5 Flash drew substantial pushback on cost inflation. If “Flash” is no longer the cheap workhorse tier, Google may win on capability deployment while losing some developer mindshare on predictability and pricing simplicity.

Talent, Labs, and Ecosystem Moves

Karpathy joins Anthropic: The day’s most engaged AI tweet was Andrej Karpathy’s announcement that he has joined Anthropic to “get back to R&D.” The tweet dominated discussion, with subsequent speculation from @scaling01 citing Axios that he’ll work on RSI/autoresearch and start a new pretraining-focused effort. While the details remain unconfirmed by Anthropic, the move was widely interpreted as a major talent win for Anthropic.

OpenAI capacity products: OpenAI announced Guaranteed Capacity, a commercial offering that lets customers secure long-term compute access for critical workloads. Sam Altman framed it as a response to a world that will remain capacity constrained as models become more useful, offering discounted tokens for 1–3 year commits.

GitHub and coding toolchain integrations: GitHub said Gemini 3.5 Flash is rolling out in Copilot, citing strong tool use, fast response times, and cache efficiency for iterative agentic coding. Cursor launched integration with Jira, allowing cloud agents to take work items and create merge-ready PRs. Code/VS Code also announced Gemini 3.5 Flash availability.

Training Algorithms, Benchmarks, and Agent Evaluation

RL/post-training discussion is shifting toward denser credit assignment: @nrehiew_ argued that the next scalable training breakthrough may build on GRPO but with denser, lower-bias credit assignment, citing directions like ECHO, Composer2, self-distillation, and OPD. @lateinteraction countered with a “pedagogical RL” framing: train a self-teacher that samples correct and easy-to-follow rollouts.

Can coding agents do research? Not yet: Intology AI released NanoGPT-Bench, an autonomous benchmark based on the NanoGPT Speedrun competition, testing whether coding agents can contribute to real AI R&D progress. Their headline result: Codex, Claude Code, and Autoresearch recover only 9.3% of human progress, mostly via hyperparameter tuning rather than algorithmic innovation.

Agent harnesses and memory are getting more formalized: @omarsar0 highlighted a 100+ page survey on code-as-agent-harness, arguing future systems need to be executable, inspectable, stateful, and governed. François Chollet made the related point that real tasks are rarely Markovian, so agents without high-fidelity trajectory compression are dramatically less useful.

Verifier quality is emerging as a bo