New version, announced 3 September 2026. Rerun the suite: Add gpt-6-astra as a second model in your next scheduled suite run alongside the one you serve today, and read the differences before changing any default.
OpenAI released GPT-6 Astra, which it describes as its most capable model for end to end work, covering reasoning, coding, computer use and tools. It is available in the Responses API and the Chat Completions API.
announced 2026-09-03 . verified 2026-09-22
This section restates the provider. It adds no judgement the provider did not make, and it contains no measurement of ours.
Entry
A different model plans and calls tools differently. Future AGI describes scoring an agent at four resolutions, end to end, trajectory, step and turn, and writes that a high end to end score can hide bad tool calls, while strong per step scores can still miss that the agent pursued the wrong goal.
Running the assistant on the new model beside the one you serve is pairwise comparison, one of the four evaluator types LangSmith documents, alongside human review, rule based code functions and LLM as judge.
If a model from this family also runs as your judge, the scoring side is checked against human labels before its verdicts carry weight. Arize writes that a 75 to 90 percent match between judge labels and human labels indicates strong alignment and readiness to scale.
Add gpt-6-astra as a second model in your next scheduled suite run alongside the one you serve today, and read the differences before changing any default.
If you are on a plan
A tracked provider update triggers a rerun of your suite within 2 business days of the announcement, and you get a written verdict. That is one of the six guarantees on every plan.
OpenAI wrote that a rapid increase in traffic can now return a 429 error with the slow_down code, and that temporary overload can return a 503 error with the server_is_overloaded code.
Source: OpenAI, API changelog . verified 2026-09-22
OpenAI announced on August 26, 2026 that whisper-1, gpt-4o-transcribe, gpt-4o-mini-transcribe and gpt-4o-transcribe-diarize are scheduled to shut down on February 26, 2027. The recommended replacements are gpt-live-transcribe and gpt-transcribe.
Source: OpenAI, Deprecations . verified 2026-09-22
OpenAI reduced GPT-5.6 Sol pricing to $4 per million input tokens and $20 per million output tokens. The entry states the reduced price is promotional through November 21.
Source: OpenAI, OpenAI API changelog . verified 2026-09-22
Sources
Change-log entries restate provider announcements with sources and dates. Impact notes cite public practitioner reports. The site publishes no measurements of its own on any model.