GPT-5.5 API Pricing
OpenAI · released Apr 23, 2026 · 1.05M context · API model ID gpt-5.5
GPT-5.5 by OpenAI API pricing: $5.00 per 1M input tokens and $30.00 per 1M output tokens (verified against the official pricing page, Oct 9, 2026).
Prices
| Price | USD per 1M tokens |
|---|---|
| Input | $5.00 |
| Output | $30.00 |
| Cache read | $0.50 |
| Cache write | Not published |
| Batch input | $2.50 |
| Batch output | $15.00 |
Verified against the provider's official pricing page on Oct 9, 2026. Official pricing page
Estimated monthly cost
$6,000
per month
- per day
- $200.00
- per request
- $0.02
Cannot estimate: a needed price is not published.
Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.
Long-context prices
Prompts longer than the threshold are billed at a higher rate.
| Prompts over | Input | Output | Cache read | Cache write |
|---|---|---|---|---|
| 272,000 tokens | $10.00 | $45.00 | $1.00 | Not published |
Monthly cost by workload
| Workload | Per month |
|---|---|
| Chatbot1,000 in / 500 out tokens, 10,000 requests a day | $6,000/mo |
| RAG8,000 in / 500 out tokens, 5,000 requests a day | $8,250/mo |
| Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input | $3,900/mo |
Context and capabilities
- Context
- 1,050,000 tokens
- Max output
- 128,000 tokens
- Input
- text, image, pdf
- Output
- text
- Knowledge cutoff
- Dec 1, 2025
- Open weights
- No
- Tool calling
- Yes
- Reasoning
- Yes
- Structured outputs
- Yes
Capabilities and limits as listed by models.dev.
Similarly priced models
- Claude Opus 5.5 · $4.00 in / $20.00 out
- GPT-6 Astra · $10.00 in / $50.00 out
- Kimi K3 · $3.00 in / $15.00 out
- Gemini 3.1 Pro Preview · $2.00 in / $12.00 out
Price history
No price changes since we started tracking on Oct 8, 2026.
Questions
- How much does GPT-5.5 cost per month?
- For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-5.5 costs about $6,000 per month at the provider's official prices (verified) ($5.00 per 1M input tokens, $30.00 per 1M output tokens).
- Does GPT-5.5 support prompt caching?
- Yes. Cached input costs $0.50 per 1M tokens, compared with $5.00 for regular input.
- How long is GPT-5.5's context window?
- GPT-5.5 accepts up to 1,050,000 tokens (1.05M) of context and returns up to 128,000 tokens per response.
- Does GPT-5.5 have a batch price?
- Yes. Asynchronous batch requests cost $2.50 per 1M input tokens and $15.00 per 1M output tokens.