GPT-6.1 Sol Ultrafast Goes Live: Up to 300 token/s, 8x Faster at 6x the Price
kimmonismus · x · 2026-09-30
Per kimmonismus, the Ultrafast tier of GPT-6.1 Sol is now live in API, ChatGPT, and Codex: 8x faster at 6x the price, reaching up to 300 token/s.
The author credits Cerebras hardware for the speedup, framing GPT-6.1 Sol as a strong counter to Sonnet 5.5 — near-Astra intelligence at 1/5 of Astra's price.
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