# OpenAI GPT-5.5 Pro

OpenAI GPT-5.5 Pro costs $30.00 per million input tokens and $180.00 per million output tokens, as of October 22, 2026. None of the 6 coding benchmarks behind the index has measured it, so it has no coding index, but 9 benchmarks outside the index have a result below.

Page: https://llmbenchmark.ai/models/gpt-5-5-pro
Data from October 22, 2026. Every figure below names the board it was read from and the day.

- Maker: OpenAI
- Released: April 24, 2026
- Price per million input tokens: $30.00
- Price per million output tokens: $180.00
- Context window: 1.05M tokens

Benchmark results (9 of 195):

- ARC-AGI: 96.5% (source: Epoch AI benchmarking hub, read October 22, 2026)
- ARC-AGI-2: 84.6% (source: Epoch AI benchmarking hub, read October 22, 2026)
- SimpleBench: 76.9% (source: Epoch AI benchmarking hub, read October 22, 2026)
- Chess puzzles: 62.0% (source: Epoch AI benchmarking hub, read October 22, 2026)
- FrontierMath, tiers 1 to 3: 87.7% (source: Epoch AI benchmarking hub, read October 22, 2026)
- FrontierMath, tier 4: 78.0% (source: Epoch AI benchmarking hub, read October 22, 2026)
- DTBench: 96.0% (source: Epoch AI benchmarking hub, read October 22, 2026)
- LMCA: 53.9% (source: Epoch AI benchmarking hub, read October 22, 2026)
- Epoch Capabilities Index: 162.9 (source: Epoch AI benchmarking hub, read October 22, 2026)