Introducing GPT-5 for developers
OpenAI released GPT-5 in its API on August 7, 2025, in three sizes: gpt-5, gpt-5-mini, and gpt-5-nano. The post reports 74.9% on SWE-bench Verified, 88% on Aider polyglot, 96.7% on τ2-bench telecom, plus new verbosity, minimal reasoning_effort, and custom tools; pricing and full availability details are not disclosed in the provided text. The real developer signal is the API surface change, not just a model rename.
Why it matters: OpenAI put GPT-5 on the API in three sizes, gpt-5, gpt-5-mini and gpt-5-nano, so developers can trade off performance, cost and latency.