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TheModelDesk

September 30, 2026
models, agents & local inference
Vol. I — No. 679 · Page C1 · The Daily Commit

Releases

GPT-6.1 Sol cuts the cost of Astra-class workloads

Following the earlier GPT-6 Sol launch, OpenAI has released GPT-6.1 Sol for coding agents and complex professional work. The model aims near GPT-6 Astra performance at one-fifth of Astra’s standard token prices. API rates are $2 per million input tokens, $0.10 for cached input and $10 for output. It is available in ChatGPT Work, Codex and the API, but not ChatGPT.


Releases

Anthropic gives Sonnet 5.5 a 30% speed boost

Anthropic has released Claude Sonnet 5.5, its mid-range model for coding and office work. The company reports a 30% speed gain over Sonnet 5 and slower token consumption. Its benchmarks put Sonnet 5.5…


Releases

Anthropic maps the migration path to Claude Opus 5.5

Anthropic’s guide for Claude Opus 5.5 explains migration and prompting changes for a model that emits output tokens more than 30 percent faster than Claude Opus 5 and often uses fewer. It recommends m…









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