Claude Opus 4.5 vs GPT-5 Medium: Specs & Benchmark Comparison
| Characteristic | Claude Opus 4.5 | GPT-5 Medium |
|---|---|---|
| Company | Anthropic | OpenAI |
| Release Date | November 23, 2025 | August 6, 2025 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 200K | 400K |
| Context (output) | 64K | 64K |
| Input Price / 1M | $5.00 | $0.75 |
| Output Price / 1M | $25.00 | $3.00 |
| Average Score | 0.9 | 0.9 |
| Benchmarks | ||
| GPQA | 0.9 | 0.9 |
Visual Benchmark Comparison
Claude Opus 4.5
GPT-5 Medium
GPQA0.9 vs 0.9
0.9
0.9
Verdict
GPT-5 Medium leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Opus 4.5 — 0.9, GPT-5 Medium — 0.9.
API Cost
GPT-5 Medium is 8.0x cheaper: input $0.75/1M vs $5.00/1M tokens.
Context Window
GPT-5 Medium supports a larger context: 400K vs 200K tokens.
Recency
Claude Opus 4.5 is newer: released 11/23/2025 vs 8/6/2025.
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The Claude Opus 4.5 and GPT-5 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 Opus 4.5 or GPT-5 Medium page. See also the complete list of AI model comparisons.