{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2026-02-19-gemini-3-1-pro/","md":"https://postcutoff.com/e/2026-02-19-gemini-3-1-pro/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2026-02-19-gemini-3-1-pro","date":"2026-02-19","date_precision":"day","short_title":"Google releases Gemini 3.1 Pro, scoring 77.1% on ARC-AGI-2","deck":null,"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.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"Gemini 3.1 Pro: a smarter model for your most complex tasks (Google blog)","url":"https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-1-pro/","type":"official","group":"primary","domain":"blog.google"},{"n":2,"title":"Gemini 3.1 Pro model card","url":"https://deepmind.google/models/model-cards/gemini-3-1-pro/","type":"official","group":"primary","domain":"deepmind.google"},{"n":3,"title":"Google Cloud: Gemini 3.1 Pro on Gemini CLI, Gemini Enterprise and Vertex AI","url":"https://cloud.google.com/blog/products/ai-machine-learning/gemini-3-1-pro-on-gemini-cli-gemini-enterprise-and-vertex-ai","type":"official","group":"primary","domain":"cloud.google.com"},{"n":4,"title":"DataCamp: Gemini 3.1 features and benchmarks","url":"https://www.datacamp.com/blog/gemini-3-1","type":"press","group":"press","domain":"datacamp.com"}],"official":3,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Google DeepMind","Google"],"title":"Google releases Gemini 3.1 Pro, scoring 77.1% on ARC-AGI-2","summary":"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.","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"],"key_numbers":[],"tags":["llm","gemini","pro","reasoning","arc-agi"],"science":null,"body_md":"## What happened\n\nGoogle shipped Gemini 3.1 Pro as a preview across developer, enterprise and consumer products, positioning it as a stronger baseline for complex problem-solving.\n\n## Why it matters\n\nThe 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.","disputed":[],"related":[{"id":"2026-09-23-gemini-4-post-training","url":"https://postcutoff.com/e/2026-09-23-gemini-4-post-training/","date":"2026-09-23","date_precision":"day","short_title":"DeepMind says Gemini 4 has entered post-training and will ship \"much earlier\" than end of 2026","deck":null,"takeaway":"Signals Google's response to GPT-6 and Anthropic's latest models after months of Flash-only releases.","category":"milestone","category_label":"Milestones","importance":3,"confidence":"medium","status":{"key":"partly","labels":["Partly confirmed"]},"sources":4,"official":0,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Google DeepMind"]},{"id":"2026-05-19-gemini-3-5-flash-io-2026","url":"https://postcutoff.com/e/2026-05-19-gemini-3-5-flash-io-2026/","date":"2026-05-19","date_precision":"day","short_title":"Google I/O 2026: Gemini 3.5 Flash, Gemini Spark agent and Antigravity 2.0","deck":null,"takeaway":"3.5 Flash marked the moment Google's cheap tier overtook its previous flagship (3.1 Pro) on agentic coding benchmarks, and it opened a run of four Flash releases in ~106 days.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":6,"official":5,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Google DeepMind","Google"]}],"people":[],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":null,"in_training_data":true},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":null,"in_training_data":true},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":null,"in_training_data":true},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":null,"in_training_data":true}],"short_url":"https://postcutoff.com/s/google-gemini-3-1-pro"}