Claude Opus 4.5 vs GPT-5.4 nano: Specs & Benchmark Comparison
| Characteristic | Claude Opus 4.5 | GPT-5.4 nano |
|---|---|---|
| Company | Anthropic | OpenAI |
| Release Date | November 23, 2025 | March 1, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 200K | 400K |
| Context (output) | 64K | 128K |
| Input Price / 1M | $5.00 | $0.12 |
| Output Price / 1M | $25.00 | $1.50 |
| Average Score | 0.9 | 0.7 |
| Benchmarks | ||
| TAU2 Telecom | 1.0 | 0.9 |
| GPQA | 0.9 | 0.8 |
Visual Benchmark Comparison
Claude Opus 4.5
GPT-5.4 nano
TAU2 Telecom1.0 vs 0.9
1.0
0.9
GPQA0.9 vs 0.8
0.9
0.8
Verdict
GPT-5.4 nano leads in 3 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Opus 4.5 — 0.9, GPT-5.4 nano — 0.7.
API Cost
GPT-5.4 nano is 18.5x cheaper: input $0.12/1M vs $5.00/1M tokens.
Context Window
GPT-5.4 nano supports a larger context: 400K vs 200K tokens.
Recency
GPT-5.4 nano is newer: released 3/1/2026 vs 11/23/2025.
More About These Models
Related Comparisons
The Claude Opus 4.5 and GPT-5.4 nano 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-5.4 nano page. See also the complete list of AI model comparisons.