GPT-4.5
GPT-4.5 is an API-only (closed weights) language model from OpenAI, released February 27, 2025. On the Epoch Capabilities Index it scores 136.4, rank 136 of 256 rated models.
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Lab
OpenAI
Released
February 27, 2025
Weights
API-only (closed weights)
Parameters
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Context
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Price / M tokens
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Epoch ECI
136.4 #136
Strengths by category
ModelTape's 0–100 fit on Epoch AI benchmark results.
| Category | Score | Based on |
|---|---|---|
| Reasoning | 9.6 | SimpleBench, Humanity's Last Exam |
| Math | 25.3 | MATH level 5, OTIS Mock AIME 2024-2025 |
Benchmark results
| Benchmark (Epoch AI) | Score |
|---|---|
| MATH level 5 | 78.6% |
| GPQA Diamond | 60.7% |
| Aider Polyglot | 44.9% |
| OTIS Mock AIME | 37.7% |
| SimpleBench | 21.4% |
| Humanity's Last Exam | 5.4% |
Links
Models with a similar score
gpt-oss-120b · Grok-3 mini · Qwen3.5-9B · GPT-5 nano · DeepSeek-R1 · Qwen3-235B-A22B · Qwen3-30B-A3B-Thinking (Jul 2025) · Qwen3-235B-A22B-Instruct (Jul 2025)
More from OpenAI
GPT-6.1 Terra · GPT-6.1 Sol · GPT-6 Sol · GPT-6 Luna · GPT-6 Astra · GPT-5.6 Cyber · Daybreak Red · Daybreak Blue