GPT-5.5 Pro
GPT-5.5 Pro is OpenAI's language model with a 1.1M context window and up to 128K output tokens, available from 6 providers, starting at $30.00 / 1M input and $180.00 / 1M output. A high-compute OpenAI reasoning LLM that applies extended thinking for consistently higher-quality answers, with support for tool use, vision, and file input.
| Benchmarks | |
|---|---|
| Time to First Token | #286 |
| Output TPS | #520 |
Capabilities
Input3/5
Text✓
Image✓
Audio·
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities7/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling✓
Structured Outputs✓
Native JSON Schema✓
Web Search✓
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
US Dollar ($)
Per 1M tokens
| Provider | Standard | Flex | Batch | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Cache Write 5m $ / 1M | Web Search $ / request | Input $ / 1M | Output $ / 1M | Input $ / 1M | Output $ / 1M | |
| $30.00 | $180.00 | N/A | N/A | N/A | — | — | — | — | |
| $30.00 | $180.00 | $3.00 | N/A | N/A | — | — | — | — | |
| $30.00 | $180.00 | $30.00 | $30.00 | N/A | — | — | — | — | |
| $30.00 | $180.00 | N/A | N/A | N/A | $15.00 | $90.00 | $15.00 | $90.00 | |
| $30.00 | $180.00 | N/A | N/A | $0.010 | — | — | — | — | |
| $30.00 | $180.00 | N/A | N/A | N/A | $15.00 | $90.00 | — | — | |
Cost Calculator
US Dollar ($)
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| GPT-6.1 Terra | 1.1M | $1.00 | $5.00 | Available | |
| GPT-6.1 Sol | 1.1M | $2.00 | $10.00 | Available | |
| GPT-6 Sol | 1.1M | $2.00 | $10.00 | Available | |
| GPT-6 Luna | 1.1M | $0.100 | $0.500 | Available | |
| GPT-6 Astra | 1.1M | $10.00 | $50.00 | Available | |
| GPT-5.6 Terra | 1.1M | $2.00 | $12.00 | Deprecating | |
| GPT-5.5 Pro | 1.1M | $30.00 | $180.00 | Current | |
| GPT-4o Audio | 128K | $2.50 | $10.00 | Deprecated | |
| GPT-4.1 mini | 1.0M | $0.200 | $0.800 | Available | |
| GPT-4.1 | 1.0M | $2.00 | $8.00 | Deprecated | |
| GPT-4.1 Batch | 1.0M | $1.00 | $4.00 | Available |