GPT-5.5
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Released April 2026 as the successor to GPT-5.4. GPT-5.5 Instant became the default ChatGPT model in May 2026, and the model remains available alongside the newer GPT-5.6 family.
At a glance
- Context window
- 1M tokens
- Max output
- 128K tokens
- Knowledge cutoff
- Dec 2025
- Modalities
- Text Text Image Image → Text Text
Capabilities
Function calling
Connect to external tools, APIs, and systems.
Structured output
Return responses in structured formats like JSON.
Web search
Search the web for up-to-date information.
Code execution
Write and execute code in a sandboxed environment.
File upload
Process uploaded documents, spreadsheets, and other files.
MCP
Connect to services via Model Context Protocol.
Image generation
Generate and edit images from text prompts.
Pricing by provider
| Provider | Input / 1M tokens | Output / 1M tokens | |
|---|---|---|---|
|
OpenAI
|
$5.00 | $30.00 |
Heads up: We do our best to keep these specs & prices accurate. However, cloud costs may fluctuate based on region, usage, and other factors not listed here. These are estimates based on common setups and are for informational purposes only. Always verify current rates & exact specs with the provider before provisioning.
Compare with other models
Estimated prices shown. Actual costs may vary based on context length, batch size, caching, and provider-specific pricing tiers.