About
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...
Related Models
Pricing
Input
$1.25
per 1M tokens
Output
$10.00
per 1M tokens
Blended
$3.44
per 1M tokens
Cheaper than 18% of models. Median price is $0.54/1M tokens.
Cost Calculator
Tokens per day1M
100K100M
Daily
$3.44
Monthly
$103.13
vs. Similar Models
Qwen: Qwen3.7 PlusQ:+0.1
$0.56-84%
GPT-5.4 (low)Q:+0.2
$5.91+72%
Z.ai: GLM 5Q:+0.6
$0.93-73%
OpenAI: GPT-5.4 NanoQ:-0.7
$0.46-87%
Performance
95
tokens/sec
Faster than 50% of models
26.59
seconds
Faster than 4% of models
26.59
seconds
Faster than 17% of models
Market Median
94 tok/s
0% faster
Median TTFT
1.11s
2289% slower
Throughput/Dollar
28
tok/s per $/1M
Speed Comparison
MiMo-V2-Flash (Non-reasoning)
95 tok/s+0%
DeepSeek V4 Flash (Non-reasoning)
94 tok/s-0%
Reka Flash 3
95 tok/s+0%
Context Window
400K
tokens
Larger than 76% of models
Max Output
128K
tokens
32% of context
Benchmarks
MMLU-Pro
87.0%
GPQA Diamond
87.3%
HLE
26.5%
LiveCodeBench
86.8%
SciCode
43.3%
TerminalBench Hard
45.5%
MATH-500Not evaluated
AIMENot evaluated
AIME 2025
94.0%
IFBench
72.9%
Long Context Recall
75.0%
Tau2
81.9%
Market AverageTop Score