Claude Opus 4.5 vs GPT-5.2 Vision: which model should you choose?
We compared Claude Opus 4.5 and GPT-5.2 Vision on price, context window and 12 benchmarks. Claude Opus 4.5 has the stronger average benchmark score; Claude Opus 4.5 is cheaper on a blended 3:1 basis.
Claude Opus 4.5
Claude Opus 4.5 is a frontier model from Anthropic. It offers a 400,000-token context window, costs $19.42 per million input tokens and $75.27 per million output tokens, and averages 87.7 across the index's benchmark suite.
- Input
- $19.42 / 1M
- Output
- $75.27 / 1M
- Context
- 400,000
- Avg score
- 87.7
- Open weights
- No
GPT-5.2 Vision
GPT-5.2 Vision is a frontier model from OpenAI. It offers a 1,000,000-token context window, costs $19.03 per million input tokens and $85.72 per million output tokens, and averages 87.4 across the index's benchmark suite.
- Input
- $19.03 / 1M
- Output
- $85.72 / 1M
- Context
- 1,000,000
- Avg score
- 87.4
- Open weights
- No
Specification comparison
| Spec | Claude Opus 4.5 | GPT-5.2 Vision | Edge |
|---|---|---|---|
| Input price / 1M | $19.42 | $19.03 | B |
| Output price / 1M | $75.27 | $85.72 | A |
| Context window | 400,000 | 1,000,000 | B |
| Max output | 4,096 | 16,384 | B |
| Average score | 87.7 | 87.4 | A |
| Arena Elo | 1491.2 | 1484.3 | A |
| Open weights | No | No | Tie |
Benchmark comparison
Claude Opus 4.5 wins 6, GPT-5.2 Vision wins 6, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Claude Opus 4.5 | GPT-5.2 Vision | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 87.0 | 89.5 | 2.5 | GPT-5.2 Vision |
| GPQA Diamond | 81.7 | 82.1 | 0.4 | GPT-5.2 Vision |
| SWE-bench Verified | 77.1 | 78.8 | 1.7 | GPT-5.2 Vision |
| HumanEval | 93.7 | 91.2 | 2.5 | Claude Opus 4.5 |
| MATH-500 | 93.7 | 92.9 | 0.8 | Claude Opus 4.5 |
| AIME 2025 | 89.8 | 85.7 | 4.1 | Claude Opus 4.5 |
| LiveCodeBench | 85.0 | 83.4 | 1.6 | Claude Opus 4.5 |
| IFEval | 92.5 | 93.9 | 1.4 | GPT-5.2 Vision |
| TruthfulQA | 88.1 | 85.3 | 2.8 | Claude Opus 4.5 |
| HellaSwag | 92.4 | 94.6 | 2.2 | GPT-5.2 Vision |
| MMMU | 84.2 | 84.4 | 0.2 | GPT-5.2 Vision |
| Arena Elo | 1491.2 | 1484.3 | 6.9 | Claude Opus 4.5 |
Price analysis
On a blended 3:1 input-to-output basis, Claude Opus 4.5 costs about $33.38 per million tokens and GPT-5.2 Vision costs about $35.70. Claude Opus 4.5 is roughly 6% cheaper than GPT-5.2 Vision. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
GPT-5.2 Vision has the larger context window at 1,000,000 tokens, compared with 400,000 for Claude Opus 4.5. That matters for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Claude Opus 4.5 wins 6, GPT-5.2 Vision wins 6, and 0 are tied. On the index average, Claude Opus 4.5 leads GPT-5.2 Vision by 0.3 points (87.7 versus 87.4).
The price picture favours Claude Opus 4.5. The context picture favours GPT-5.2 Vision. Those two dimensions often matter more than a few benchmark points once a model is good enough for the task.
If you need a single default, start with Claude Opus 4.5 for quality-sensitive work, and check whether its price holds at your expected volume before committing.
Choose Claude Opus 4.5 if
- You want the higher average benchmark score in this index.
- Unit cost matters and you want the cheaper blended price.
Choose GPT-5.2 Vision if
- You need the larger 1,000,000-token context window.
- You need the larger 16,384-token output limit.
FAQ
Is Claude Opus 4.5 better than GPT-5.2 Vision?
On the index average, Claude Opus 4.5 leads GPT-5.2 Vision by 0.3 points (87.7 versus 87.4). The better choice depends on price, context and your task. Claude Opus 4.5 wins 6 benchmarks, GPT-5.2 Vision wins 6.
Which is cheaper, Claude Opus 4.5 or GPT-5.2 Vision?
Claude Opus 4.5 is cheaper on a blended 3:1 basis at about $33.38 per million tokens, versus $35.70 for GPT-5.2 Vision.
Which has the larger context window?
GPT-5.2 Vision has the larger context window at 1,000,000 tokens. Claude Opus 4.5 has 400,000 tokens.
Are these models open weights?
Claude Opus 4.5 is proprietary; GPT-5.2 Vision is proprietary.
Which should I choose for production?
If you need a single default, start with Claude Opus 4.5 for quality-sensitive work, and check whether its price holds at your expected volume before committing.