Last refreshed 2026-06-15. Next refresh: weekly.
Why use GPT-5.5 on OpenRouter?
OpenRouter offers GPT-5.5 with pay-as-you-go pricing at $5.00/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare GPT-5.5 across 4 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: openai/gpt-5.5openai/gpt-5.5Request example
openai/gpt-5.5.Gotchas
- Use provider model ID "openai/gpt-5.5", not the LLMReference slug "gpt-5.5".
Compare GPT-5.5 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| OpenAI API | $5.00 | $30.00 |
| OpenRouter | $5.00 | $30.00 |
| Vercel AI Gateway | $5.00 | $30.00 |
| AWS Bedrock | $5.50 | $33.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $5.00 |
| Output tokens | $30.00 |
Capabilities
About GPT-5.5
GPT-5.5 is OpenAI's fully retrained agentic model, released April 23, 2026. Optimised for agentic coding, computer use, knowledge work, and early scientific research. Achieves 82.7% on Terminal-Bench 2.0 (Codex CLI scaffold), 84.9% on GDPval, 58.6% on SWE-Bench Pro, 93.6% on GPQA Diamond, and 82.6% on SWE-Bench Verified (Vals.ai independent harness). Knowledge cutoff December 2025. Supports reasoning effort levels (none/low/medium/high/xhigh). Context window 1,050,000 tokens with a long-context surcharge above 272K tokens. Model ID: gpt-5.5.
FAQ
What does GPT-5.5 cost on OpenRouter?
On OpenRouter, GPT-5.5 costs $5 per 1M input tokens and $30 per 1M output tokens.
What is the context window for GPT-5.5 on OpenRouter?
GPT-5.5 supports a 1.05m token context window on OpenRouter.
How does OpenRouter compare to other GPT-5.5 providers?
GPT-5.5 is available from 4 providers. The cheapest input pricing is $5/1M tokens from OpenAI API.
What API model ID do I use for GPT-5.5 on OpenRouter?
Use the model ID openai/gpt-5.5 when calling OpenRouter's API.
Who created GPT-5.5?
GPT-5.5 was created by OpenAI as part of the GPT-5.5 model family.
Is GPT-5.5 open source?
GPT-5.5 is not open source; the seed data lists it as proprietary.