LLM Comparison
GPT-5.5 vs GPT-5.5 Pro
Side-by-side specs, pricing & capabilities
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2/6 models| Organization | ||
| OpenTools Score | 67 3.8 | |
| Family | GPT | GPT |
| Status | Current | Current |
| Release Date | Apr 2026 | Apr 2026 |
| Context Window | 1.1M tokens | 1.1M tokens |
| Input Price | $5.00/M tokens | $30.00/M tokens |
| Output Price | $30.00/M tokens | $180.00/M tokens |
| Pricing Notes | Cached input: $0.50/M tokens. Long context (>272K tokens): 2x input, 1.5x output. Batch API: 50% discount. Priority: 2.5x standard. | No cached input discount. Long context (>272K tokens): 2x input, 1.5x output. Batch API: 50% discount. Regional processing: 10% uplift. |
| Capabilities | textvisioncodetool-useextended-thinkingcomputer-useweb-search | textvisioncodetool-useextended-thinkingweb-search |
| Training Cutoff | Dec 01, 2025 | Dec 01, 2025 |
| Max Output | 128K tokens | 128K tokens |
| API Identifier | openai/gpt-5.5 | openai/gpt-5.5-pro |
| Benchmarks | ||
| Artificial Analysis Intelligence Index v4.3 | 38.6 indexartificial-analysis | — |
| GPQA Diamond | 93.5%artificial-analysis | — |
| SciCode | 55.8%artificial-analysis | — |
| Terminal-Bench 2.1 | 84.3%artificial-analysis | — |
| View GPT-5.5 | View GPT-5.5 Pro | |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| GPT-5.5Cheapest | $5.00 | $15.00 | $20.00 | — |
| GPT-5.5 Pro | $30.00 | $90.00 | $120.00 | +500% |
OpenAI
GPT-5.5
GPT-5.5 is OpenAI's smartest and most intuitive model, built for agentic work like coding, research, and data analysis. It matches GPT-5.4 per-token latency while delivering higher intelligence with significantly fewer tokens. Supports a 1,050,000 token context window and five reasoning effort levels (none through xhigh).
OpenAI
GPT-5.5 Pro
GPT-5.5 Pro uses more compute to think harder and provide consistently better answers than GPT-5.5. Designed for the toughest problems, some requests may take several minutes. It excels at FrontierMath Tier 4 (39.6%) and BrowseComp (90.1%), offering the highest intelligence available from OpenAI at a premium price point.
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