AI Benchmark Model
GPT-5.5 (low)
Benchmark scores, pricing, speed, and model comparisons for GPT-5.5 (low).
Key scores
GPT-5.5 (low) is an artificial intelligence model developed by OpenAI and released on April 23, 2026. In terms of performance metrics, the model achieves an intelligence index of 50.8 and a coding index of 52.1. Benchmark results for the model include a GPQA score of 0.91, an HLE score of 0.31, a SciCode score of 0.516, and an IFBench score of approximately 0.64. Additional performance data shows an LCR score of 0.72, a TerminalBench Hard score of 0.523, and a TAU2 score of 0.839. Regarding operational speed, the model provides an output speed of 63.516 tokens per second with a time to first token of 1.542 seconds. Pricing is set at $5.00 per million input tokens and $30.00 per million output tokens.
Benchmark results
7 tracked benchmark rows for GPT-5.5 (low).
GPQA Reasoning
91.0% TAU2 Other
83.9% LCR Other
72.0% IFBench Other
64.4% TerminalBench Hard Other
52.3% SciCode Other
51.6% HLE Other
31.0%
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