GPT 5.5
GPT 5.5 is the standard tier of the GPT-5.5 model family, advancing the GPT-5 series with stronger intent understanding, deeper autonomous work, and improvements across coding, research, data analysis, and document creation.
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.5', prompt: 'Why is the sky blue?'})Playground
Try out GPT 5.5 by OpenAI. Usage is billed to your team at API rates. Free users (those who haven't made a payment) get $5 of credits every 30 days.
GPT 5.5
Ask GPT 5.5 anything to try it out.
Providers
Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.
| Provider |
|---|
OpenAI | 1M | 0.9s | 61tps | $5.00/M | $30.00/M | Read: $0.5/M Write: — | $10.00/K + input costs | — | +4 | 04/24/2026 | ||
 Azure | 272K | 1.2s | 42tps | $5.00/M | $30.00/M | Read: $0.5/M Write: — | $14/K + input costs | — | +4 | 04/24/2026 | ||
 Amazon Bedrock | 272K | 0.5s | 64tps | $5.50/M | $33.00/M | Read:$0.55/M Write:— | — | — | +4 | 04/24/2026 |
P50 throughput on live AI Gateway traffic, in tokens per second (TPS). Visit the docs for more info.
P50 time to first token (TTFT) on live AI Gateway traffic, in milliseconds. View the docs for more info.
Direct request success rate on AI Gateway and per-provider. Visit the docs for more info.
More models by OpenAI
| Model |
|---|
| 400K | 0.9s | 219tps | $0.75/M | $4.50/M | Read:$0.07/M Write:— | $10.00/K + input costs | — | +4 | | 03/17/2026 | |||
| 400K | 0.5s | 170tps | $0.20/M | $1.25/M | Read:$0.02/M Write:— | $10.00/K + input costs | — | +4 | | 03/17/2026 | |||
| 1.1M | 1.4s | 98tps | $2.50/M | $15.00/M | Read: $0.25/M Write: — | $10.00/K + input costs | — | +4 | | 03/05/2026 | |||
| 400K | 3.8s | 148tps | $0.25/M | $2.00/M | Read:$0.03/M Write:— | $14/K + input costs | — | +4 | | 08/07/2025 | |||
| 131K | 0.2s | 456tps | $0.35/M | $0.75/M | Read:$0.25/M Write:— | — | — |   +5 | 08/05/2025 | ||||
| 128K | 0.6s | 65tps | $0.15/M | $0.60/M | Read:$0.07/M Write:— | $14/K + input costs | — | +3 | | 07/18/2024 |
About GPT 5.5
GPT 5.5 became available on April 24, 2026 on AI Gateway as the standard tier of the GPT-5.5 model family. OpenAI positions it as a model that understands what you're trying to do faster and can carry more of the work itself, extending the agentic gains of the GPT-5.x line.
The model excels at writing and debugging code, researching online, analyzing data, creating documents and spreadsheets, scheduling, learning, and answering everyday personal questions. It supports tool use, web search, implicit caching, file inputs, and vision, giving developers a single model that fits across coding, research, and knowledge-work pipelines.
With a context window of 1M tokens and up to 272K tokens output tokens, GPT 5.5 handles long inputs and produces substantial outputs in a single pass. Pricing is $5 per million input tokens and $30 per million output tokens, with cached input billed at $0.5. Integrate GPT 5.5 through the AI SDK, Chat Completions API, or Responses API depending on your stack.
What To Consider When Choosing a Provider
- Configuration: GPT 5.5 understands what you're trying to do faster and can carry more of the work itself than earlier GPT-5.x generations. It is a general-purpose model that handles code, research, data analysis, document creation, and conversational assistance from a single architecture.
- Configuration: It launches alongside the higher-capability pro variant. Use the standard tier for everyday production traffic and route the hardest queries to GPT-5.5 Pro when the quality difference justifies the cost.
- Zero Data Retention: AI Gateway does not currently support Zero Data Retention for this model. See the documentation for models that support ZDR.
- Authentication: AI Gateway authenticates requests using an API key or OIDC token. You do not need to manage provider credentials directly.
When to Use GPT 5.5
Best For
- Code writing and debugging: Development assistance, refactoring, and bug diagnosis across substantial codebases
- Online research: Multi-source research synthesis with web search and tool use
- Data analysis: Spreadsheet generation, structured analysis, and quantitative reasoning over tabular inputs
- Document creation: Reports, plans, and long-form writing where the model carries more of the drafting work
- Agentic workflows: Complex tasks that combine tools, file inputs, vision, and multi-step planning
Consider Alternatives When
- Hardest queries: GPT-5.5 Pro applies higher capability for the most demanding analysis
- Cost optimization: Earlier GPT-5.x mini or nano tiers for high-volume routine traffic
- Specialized coding agents: GPT-5.x codex variants for autonomous software engineering in sandboxed environments
- Pure chain-of-thought: The o-series reasoning models when mathematical or scientific reasoning dominates
Conclusion
GPT 5.5 extends the GPT-5 series with stronger intent understanding and a wider range of autonomous work, available through AI Gateway. It is the standard tier of the GPT-5.5 family for general-purpose coding, research, and knowledge work.