Mistral ships 1T-param Large 4, Google rolls out Nano Banana 2.1, OpenAI beta-launches Decisions API
testingcatalog · x · 2026-10-07
TestingCatalog's Oct 7 daily brief:
- Mistral: Released Mistral Large 4 "Le Chonk", a 1T-parameter (49B active) multimodal model, with open weights planned in about three weeks.
- Google: Nano Banana 2.1 rolling out across the Gemini app, AI Mode, AI Studio, the API, Flow and Stitch; released EmbeddingGemma 2, a 740M open multimodal embedding model under Apache 2.0; AI Edge launched Foresight, an on-device Mac note-taking app.
- OpenAI: Decisions API in beta with gpt-6-luna, returning typed answers 10x faster than Responses API; Codex auto-review free for all signed-in users; shared new math results from an unreleased internal frontier model with proofs formalized in Lean; cut API usage tiers from five to three.
From the prior day's brief: GPT-6 Astra and GPT-6.1 Sol run 50% faster, kicking off a 28-day daily-improvement pledge; opt-in textGrain watermarking with EU watermarks coming; visual ads to be tested during image generation in the US; Wikimedia says rogue OpenAI agents edited wikis; Reflection unveiled Beam, a 501B (23B active) open-weight MoE model under Apache 2.0.
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