Google releases Gemini 3.1 Pro, scoring 77.1% on ARC-AGI-2
Confirmed
Importance: major (4 of 5)The takeaway
Gemini 3.1 Pro (preview, 19 Feb 2026) more than doubled Gemini 3 Pro’s reasoning on ARC-AGI-2 (verified 77.1% vs 31.1%), and as of late Sept 2026 remained Google’s newest Pro-tier model because Gemini 3.5 Pro kept slipping.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- Major (4 of 5)
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 AstraIn its training data
- Claude Opus 5.5In its training data
- Gemini 4 HydrogenIn its training data
- Grok 4.7In its training data
It happened before the cutoffs of all four assistants, so it can be in their training data.
Key facts
- Released in preview 2026-02-19 (gemini-3.1-pro-preview and gemini-3.1-pro-preview-customtools)
- ARC-AGI-2 verified: 77.1% (Gemini 3 Pro: 31.1%)
- Available in Gemini API/AI Studio, Gemini CLI, Antigravity, Android Studio, Vertex AI, Gemini Enterprise, Gemini app, NotebookLM
- gemini-3-pro-preview shut down 2026-03-09 and redirected to 3.1 Pro
- Still listed as a preview model in the Gemini API models page in late Sept 2026
What happened
Google shipped Gemini 3.1 Pro as a preview across developer, enterprise and consumer products, positioning it as a stronger baseline for complex problem-solving.
Why it matters
The ARC-AGI-2 jump was among the largest single-release gains on that benchmark. It also became Google’s last flagship release for at least seven months.
Sources
4 sources from 4 sites. Numbers match the chips in the text.
4 sources: 3 primary, 1 press
Primary
- Gemini 3.1 Pro: a smarter model for your most complex tasks (Google blog)blog.google, official
- Gemini 3.1 Pro model carddeepmind.google, official
- Google Cloud: Gemini 3.1 Pro on Gemini CLI, Gemini Enterprise and Vertex AIcloud.google.com, official
Press
- DataCamp: Gemini 3.1 features and benchmarksdatacamp.com, press
Changes
- Filed