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2026/9/23 14:51 (UTC+8) · New Model · OpenAI 🚀 gpt-6-sol and gpt-6-luna are live at half the previous generation’s price On 22 September OpenAI filled in the mid and light tiers of the GPT-6 family, and says these are permanent prices, not a limited-time promotion. The same day, Anthropic released Claude Opus 5.5 at a lower price too; with both providers cutting at once, developers and users benefit directly. Pricing per 1M tokens (all four items match the provider):
  • gpt-6-sol: $2 input / $10 output / $0.20 cache read, down from $4 / $20 for gpt-5.6-sol
  • gpt-6-luna: $0.10 input / $0.50 output / $0.01 cache read, down from $0.20 / $1.20 for gpt-5.6-luna
Available in the default / svip / CodexResponses groups. In our launch-day tests, both /v1/chat/completions and /v1/responses passed, and the Chat endpoint accepts function tools too, so migrating from 5.6 is a model-name change. 📖 Benchmarks, 272K tier pricing and code samples: GPT-6 Sol and Luna Are Live
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