OpenAI: GPT-5.5
by OpenAIOpenAI: GPT-5.5 is a large language model from OpenAI. It costs $5.00 per million input tokens and $30.00 per million output tokens. Its context window is 1.1M tokens.
- Input / 1M tokens
- $5.00
- Output / 1M tokens
- $30.00
- Cached input / 1M
- $0.500
- Context window
- 1.1M
On repeated prefixes
tokens
This model also charges $0.01 per search request
That is $10.00 per 1,000 requests, billed on top of the token prices above. On a typical 1,000-in / 500-out exchange the tokens cost $0.02, so the search fee is 50% on top. Per-token rankings elsewhere ignore this entirely.
Who serves it cheapest
3 hosts serve GPT-5.5. Same weights, same API - the price difference is pure margin and routing.
| Provider | Input / 1M | Output / 1M | Context | Throughput | Uptime 24h |
|---|---|---|---|---|---|
| OpenAICheapest | $2.50 | $15.00 | 1.1M | - | 100.0% |
| Azure | $5.00 | $30.00 | 1.1M | - | 100.0% |
| Amazon Bedrock | $5.50 | $33.00 | 1.1M | - | - |
The spread between OpenAI and Amazon Bedrock is 2.2× for identical weights. Quantization and context limits differ, so check both columns before switching.
Benchmarks
Independent scores published alongside the catalogue.
- Coding index
- 74.9
- Agentic index
- 36.4
About GPT-5.5
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
Specifications
| Model ID | openai/gpt-5.5 |
|---|---|
| Provider | OpenAI |
| Context window | 1.1M tokens |
| Max output | 128K tokens |
| Input modalities | file, image, text |
| Output modalities | text |
| Knowledge cutoff | 2025-12-01 |
| Open weights | No |
| Released | April 24, 2026 |
Cheaper alternatives
Models that cost less than GPT-5.5 while keeping at least half its context window and every input modality it supports.
Frequently asked
How much does OpenAI: GPT-5.5 cost?
$5.00 per million input tokens and $30.00 per million output tokens. Cached input reads cost $0.500 per million tokens.
What is the context window of OpenAI: GPT-5.5?
1.1M tokens, with up to 128K tokens of output per request.
Does OpenAI: GPT-5.5 have extra fees beyond per-token pricing?
Yes. OpenAI: GPT-5.5 charges $0.01 per search request - $10.00 per 1,000 requests - on top of $5.00 per million input tokens and $30.00 per million output tokens. On a typical 1,000-input / 500-output exchange the search fee alone is 50% on top.
Which provider serves OpenAI: GPT-5.5 cheapest?
OpenAI at $2.50 per million input tokens - 2.2× cheaper than Amazon Bedrock, the most expensive of the 3 hosts serving it.
Confirm against the source: OpenAI official pricing.