GPT-5.6 Sol, Terra, and Luna are available
The GPT-5.6 family now spans frontier, balanced, and efficient workloads through the same OpenAI-compatible API.
- 372K context
- Sol and Terra support Ultra effort
- Luna supports up to Max effort
Changelog
User-visible product changes only.
Dedicated changelog and docs navigation polish
Changelog now has a permanent page, and the docs sidebar tracks the current section while reading.
- New /changelog route
- Docs scroll-spy for tools subsections
- Header and footer now point to the page
Chinese and English website modes
The website gained a language toggle with typography tuned separately for Chinese copy.
- Chinese copy across home, docs, pricing, models, dashboard
- Natural Chinese line breaks
- Shared dark and light theme support
Account console for API keys and credit
Email verification signs users into a private dashboard for key management, balance, billing, and usage.
- Email code sign-in
- Self-service API key creation and revoke
- Usage summary and billing panels
Subscription plans replace public token buckets
Starter, Basic, and Plus now package monthly credits for API keys and mobile chat.
- Three public subscription plans
- Shared credits for API and mobile chat
- Internal metering remains credit-based
gpt-5.5 added to the catalogue
The highest quality tier is available for demanding prompts and important outputs.
- Text, vision, streaming, tools
- 256k context tier
- OpenAI SDK compatible route
Companion mobile app uses the same balance
The same account balance and API key ownership can be used from the companion mobile experience.
- Same account identity
- Same balance ledger
- Designed for quick daily prompts
Cached input billing is live
Repeated prefixes can be billed at the cached input rate when supported by the selected model.
- Cached input shown separately
- 1/10x repeated-prefix rate
- Usage debit tied to successful calls
Semantic SSE streaming events
Streaming responses now follow OpenAI-style semantic event shapes for compatible clients.
- Responses API streaming
- Chat completion compatibility
- Tool events where supported