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Gemini 4 Carbon, Google's strongest model, became available to paying API developers on 10 November 2026 and is rolling out to Google AI Ultra subscribers. Google still recommends Argon for most software and knowledge work. Carbon costs $2 per million input tokens and $10 per million output tokens until 30 November, then $4 and $20.
Anthropic released Claude Fable 5.2 and Claude Mythos 5.2 on November 9, 2026. The company says both produce output up to 30% faster than the 5.1 models. Standard API prices for Fable 5.2 fall 20% to $8 per million input tokens and $40 per million output tokens. Fable 5.2 is available to developers; Mythos 5.2 is limited to vetted organizations.
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