GPT-5.6: OpenAI’s best publicly available model (jul 9, 2026 – 4h 6min, jul 26, 2026 y)

Description:

OpenAI releases GPT-5.6 for general availability across ChatGPT, Codex, and the API, following a limited preview that began June 26, 2026. The family spans three tiers: Sol, the flagship model; Terra, a balanced mid-cost option; and Luna, the fastest and cheapest. OpenAI reports Sol sets new state-of-the-art results on benchmarks including BrowseComp, OSWorld 2.0, and the Artificial Analysis Coding Agent Index while using fewer tokens than prior models. The release introduces an "ultra" mode that coordinates multiple agents in parallel on complex tasks, alongside a new "max" reasoning effort setting. API pricing is set at $5 per million input tokens and $30 per million output tokens for Sol, with lower rates for Terra and Luna.

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