Hosted model APIs with dated snapshots and distinct endpoint formats. Confirm current lifecycle and service terms.
Official documentation ↗A September 2026 release for complex coding and professional work, available through Responses and Chat Completions.
OpenAI directs tool-calling workflows to the Responses API. Record the service tier and reasoning setting; Ultrafast mode was added on October 8, 2026.
A September 2026 reasoning model with text and image inputs and text output.
Responses and Chat Completions are supported; the Decisions API was added in beta on October 6, 2026. Evaluate that endpoint separately and recheck prices and token tiers.
A September 2026 reasoning model with text and image inputs, introduced alongside GPT-6 Luna.
Distinguish GPT-6 Sol from the later GPT-6.1 Sol release. Pricing depends on input length, caching and processing tier; keep those choices in the evaluation record.
A September 2026 GPT release for demanding work across reasoning, coding, computer use, research and documents.
GPT-6 Astra does not support none reasoning effort, custom temperature, top_p or logprobs. Check your request adapter before replaying prompts from earlier models.
A September 2026 image generation and editing release, positioned for everyday image workflows.
Image API and Responses image-generation tool behavior can differ. Record quality setting, output size, edits and total billing; a text-model token estimate is insufficient.
A September 2026 image generation and editing release, positioned for editing precision.
The provider positioning is a hypothesis to test. Compare preservation of unchanged image regions and instruction compliance at the same output size and quality setting.
A hosted model family introduced for coding and instruction following.
Use a dated model snapshot for reproducible API comparisons. Responses and Chat Completions have different request shapes.
The publisher identifies the model family or checkpoint. An inference operator selects a runtime, quantization and service configuration. The API endpoint defines the accepted request shape and operational limits. Compare all three when planning a migration.
Official release notes can announce previews, general availability, retirement and alias changes. A model appearing in an API list is an observation of access, not necessarily a new public release.
Open the release radar →