An ongoing case we follow · developing

Frontier model API prices

Opus 5.5 and Grok 4.7 were released on 22 September; OpenAI cut GPT-6 Sol and Luna API prices, and Cognition cut Devin prices. Anthropic's Sonnet 5.5, OpenAI's GPT-6.1 Sol and Google's Gemini 4 Argon followed, then Mistral released Large 4 in public preview and later its weights, with API prices listed. Anthropic released Haiku 5.5 at a lower price and OpenAI's GPT-6.1 Terra launched 50% below GPT-5.6 Terra; Google priced Gemini 4 Carbon at $2 and $10 per million tokens.