Confirmed model releases

AI model releases in September 2026

The confirmed release record for September 2026, grouped by provider and linked to the primary source used for each date.

5 confirmed releases4 providersData through Sep 2, 2026How releases are confirmed

September 2026

5 releases across 4 providers

Release	Provider	Confirmed	Evidence	BenchLM
September 2026· 5 releases
Gemini 3.8 Flash and Gemini 3.8 Flash Cyber2 model variants	Google	Sep 2, 2026Exact day	Google	Benchmarks
Muse Spark 1.3	Meta	Sep 2, 2026Exact day	Meta AI Research	Benchmarks
Quasar 438B	Multiverse Computing	Sep 2, 2026Exact day	Multiverse Computing	Benchmarks
Claude Fable 5.1 and Claude Mythos 5.12 model variants	Anthropic	Sep 1, 2026Exact day	Anthropic	Benchmarks
Muse Voice Transcribe	Meta	Sep 1, 2026Exact day	Meta AI Research	Benchmarks