Release21d ago
Codex kicks off "28 days of improvements or a full reset": Day 1 makes GPT-6 Astra and GPT-6.1 Sol ~50% faster by default, including OpenCode, Pi, Amp and Devin via Sign in with ChatGPT
On Oct 5, Codex lead Thibault "Tibo" Sottiaux committed that for the next 28 days OpenAI will ship one clear improvement for most Codex/ChatGPT Work users each day, or give everyone a full usage reset. Day 1 is an inference speedup: GPT-6 Astra and GPT-6.1 Sol are ~50% faster by default on subscriptions (roughly 30 to 50 tokens/s), including partner tools using Sign in with ChatGPT. No API speed change was announced.
Tooling6d ago
Breken launches a "production before production": synthetic users and agents run your real software to find bugs, and its own ESCAPES benchmark says it caught 76 of 235 shipped bugs, twice what Claude Code found
On October 21 the startup Breken launched its product of the same name as "production engineering". It rebuilds the whole application in an isolated environment, grows production data at 4,000x speed, lets synthetic users and agents with intent and limited patience use it, and varies one condition at a time, such as a retry, a lost response or a clock jump. When a failure reproduces every time it hands back the state, a trace and a draft fix PR. It also published an open benchmark, ESCAPES: 327 bugs from 33 open-source products that reached users. Scanning each product once on its July 1 code, Breken caught 76 of the 235 bugs already present (32%), against 37 (16%) for Claude Fable 5.1 in Claude Code. These are vendor-run results.
Benchmark7d ago
Devin Fusion with an Opus 5.5 lead and GPT-6 Luna sidekick tops the Artificial Analysis Coding Agent Index at 68.1, at what Cognition says is 31% lower cost per task than Claude Code with Opus 5.5
Cognition said on October 19 that Devin Fusion, pairing Claude Opus 5.5 as the lead with GPT-6 Luna as the sidekick, scored 68.1 on the Artificial Analysis Coding Agent Index v1.5. Artificial Analysis's current data puts it first, but only 0.1 ahead of Muse Code with Muse Wonder Full at 68.0, effectively a tie; Antigravity CLI with Gemini 4 Argon is third at 63.8. Cognition says the pairing costs 31% less per task than Claude Code with Opus 5.5 (vendor-reported). Fusion ships in Devin CLI and Desktop.
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