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GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning to allocate computation dynamically, responding quickly to simple queries while spending more depth on complex tasks. The model produces clearer, more grounded explanations with reduced jargon, making it easier to follow even on technical or multi-step problems. Built for broad task coverage, GPT-5.1 delivers consistent gains across math, coding, and structured analysis workloads, with more coherent long-form answers and improved tool-use reliability. It also features refined conversational alignment, enabling warmer, more intuitive responses without compromising precision. GPT-5.1 serves as the primary full-capability successor to GPT-5
Quality Index
47.7
15th of 444
Top 3%
Coding Index
44.7
13th of 354
Top 4%
Math Index
94.0
13th of 268
Top 5%
Price/1M
$3.44
580th cheapest
1046% above median
Top 87%
Speed
94 tok/s
Top 27%
TTFT
37.94s
Context Window
400K
41st largest
Top 16%
Input
$1.25
per 1M tokens
Output
$10.00
per 1M tokens
Blended
$3.44
per 1M tokens
Cheaper than 13% of models. Median price is $0.30/1M tokens.
Daily
$3.44
Monthly
$103.14
94
tokens/sec
Faster than 73% of models
37.94
seconds
Faster than 2% of models
37.94
seconds
Faster than 7% of models
Market Median
45 tok/s
108% faster
Median TTFT
0.42s
8978% slower
Throughput/Dollar
27
tok/s per $/1M
Speed Comparison
Context Window
400K
tokens
Larger than 84% of models
Max Output
128K
tokens
32% of context