{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/gemini-3-5-flash/","md":"https://postcutoff.com/m/gemini-3-5-flash/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":"gemini-3-5-flash","name":"Gemini 3.5 Flash","org":"Google DeepMind","family":"Gemini 3.5","released":"2026-05-19","status":"deprecated","type":"reasoning-llm","modality_in":["text","image","audio","video","pdf"],"modality_out":["text"],"open_weights":false,"model_license":"proprietary","context_window":1048576,"max_output":65536,"knowledge_cutoff":null,"pricing":{"input":1.5,"output":9,"unit":"per 1M tokens (Standard tier)","source":"https://ai.google.dev/gemini-api/docs/pricing"},"price_line":"$1.50 in, $9 out per 1M tokens","access":[{"provider":"Gemini API","model_id":"gemini-3.5-flash","endpoint":"https://generativelanguage.googleapis.com/v1beta/models/gemini-3.5-flash:generateContent","docs":"https://ai.google.dev/gemini-api/docs/models/gemini-3.5-flash"},{"provider":"Google Cloud Gemini Enterprise Agent Platform (Vertex AI)","model_id":"gemini-3.5-flash","docs":"https://docs.cloud.google.com/gemini-enterprise-agent-platform/models/gemini/3-5-flash"},{"provider":"OpenRouter","model_id":"google/gemini-3.5-flash"}],"capabilities":[{"name":"Flash beats previous Pro on agents","detail":"Outperformed Gemini 3.1 Pro on Terminal-Bench 2.1 (76.2%), GDPval-AA (1656 Elo) and MCP Atlas (83.6%); 84.2% CharXiv Reasoning.","first":false,"discovered":"launch","source":"https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-5/"},{"name":"High output speed","detail":"Google claims ~4x the output tokens/second of other frontier models at launch.","first":false,"discovered":"launch","source":"https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-5/"}],"entry":null,"notes":"Deprecated on 2026-10-08: all requests to gemini-3.5-flash are now automatically routed to gemini-3.6-flash (Gemini API changelog, https://ai.google.dev/gemini-api/docs/changelog). Use gemini-3.8-flash (or 3.6-flash). Launched at Google I/O 2026 as first Gemini 3.5 model. Model page lists gemini-3-flash-preview (Dec 2025) as its preview predecessor id; that preview is still served. Now more expensive than 3.6-3.8 Flash; use gemini-3.8-flash.","verified":"2026-10-10","body_md":"First model of the Gemini 3.5 generation (I/O, May 2026). Kept for compatibility; newer 3.6-3.8 Flash models are cheaper and stronger.\n\n```bash\ncurl \"https://generativelanguage.googleapis.com/v1beta/models/gemini-3.5-flash:generateContent\" \\\n  -H \"x-goog-api-key: $GEMINI_API_KEY\" -H \"Content-Type: application/json\" \\\n  -d '{\"contents\":[{\"parts\":[{\"text\":\"Hello\"}]}]}'\n```\n\nSources: [model page](https://ai.google.dev/gemini-api/docs/models/gemini-3.5-flash), [pricing](https://ai.google.dev/gemini-api/docs/pricing), [deprecations](https://ai.google.dev/gemini-api/docs/deprecations), [I/O blog](https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-5/).","page_url":"https://postcutoff.com/m/gemini-3-5-flash/","events_after":null,"major_after":null,"historic_after":null,"missing_at_launch":null,"events_since_release":1842,"you_url":null,"briefings":null}