Verified history
This means HyperObserve has not found sufficient first-party evidence for a dated before-and-after event. It does not mean OpenAI API has never changed. Undated values are kept in the current baseline below instead of being presented as history.
Current monitored baseline
HyperObserve currently monitors 3 scoped observations for OpenAI API. The baseline covers API rate-limit scope, GPT-5.6 Sol / Terra / Luna context window, GPT-5.6 maximum output. Each value retains its plan, product, endpoint, region, account, or runtime qualifier so a future change can be compared against the correct scope.
| Constraint | Current value | Scope | Verified source |
|---|---|---|---|
| API rate-limit scopeOpenAI measures RPM, RPD, TPM, TPD, IPM, and certain audio limits; the first exhausted limiter applies. | Varies by model and usage tier | All API organizations | OpenAIAug 22, 2026 |
| GPT-5.6 Sol / Terra / Luna context windowModel-specific API context window; output is also bounded separately. | 1,050,000 tokens | GPT-5.6 | OpenAIAug 22, 2026 |
| GPT-5.6 maximum outputSeparate output ceiling shown for the current GPT-5.6 Sol, Terra, and Luna models. | 128,000 tokens | GPT-5.6 | OpenAIAug 22, 2026 |
Tracked constraints and impact
Model context, output, rate, and project-scoped API constraints. A change is recorded only when it alters a constraint developers can act on, such as capacity planning, request shaping, model selection, deployment configuration, storage design, retry behavior, or account budgeting.
OpenAI API rate limits
How OpenAI API rate limits work across models, usage tiers, projects, and response headers, with the current official source.
OpenAI API context windows
Current source-backed GPT-5.6 context-window and maximum-output values, plus the budgeting distinction developers need.
How a change is verified
- Compare the current first-party statement with the previously stored observation, including the exact plan, model, runtime, endpoint, region, and account scope.
- Separate a true product change from documentation clarification, temporary capacity, configurable account state, or a limit that applies to a different execution path.
- Preserve the old and new values, official source, effective date when disclosed, detection date, and practical impact. If those elements cannot be supported, no historical event is published.
Official sources monitored
These first-party documents support the current OpenAI API baseline. HyperObserve links directly to them so you can confirm the live wording before making a production decision.
How rate limits work, usage tiers, and response headers
GPT-5.6 model specifications