Claude 3 Opus vs GPT-5.1 Medium: Specs & Benchmark Comparison
| Characteristic | Claude 3 Opus | GPT-5.1 Medium |
|---|---|---|
| Company | Anthropic | OpenAI |
| Release Date | February 29, 2024 | November 11, 2025 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 200K | 256K |
| Context (output) | 200K | 64K |
| Input Price / 1M | $15.00 | $1.00 |
| Output Price / 1M | $75.00 | $4.00 |
| Average Score | 0.8 | 1.0 |
Verdict
GPT-5.1 Medium leads in 3 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude 3 Opus — 0.8, GPT-5.1 Medium — 1.0.
API Cost
GPT-5.1 Medium is 18.0x cheaper: input $1.00/1M vs $15.00/1M tokens.
Context Window
GPT-5.1 Medium supports a larger context: 256K vs 200K tokens.
Recency
GPT-5.1 Medium is newer: released 11/11/2025 vs 2/29/2024.
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Frequently Asked Questions
Which is better for coding — Claude 3 Opus or GPT-5.1 Medium?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Claude 3 Opus or GPT-5.1 Medium?
GPT-5.1 Medium is cheaper for input: $1.00 per 1M tokens vs $15.00.
Which has a larger context window — Claude 3 Opus or GPT-5.1 Medium?
GPT-5.1 Medium supports a larger context: 256,000 tokens vs 200,000.
The Claude 3 Opus and GPT-5.1 Medium comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude 3 Opus or GPT-5.1 Medium page. See also the complete list of AI model comparisons.