Claude Opus 4.5 vs GPT-5
API pricing, context window and capabilities for Claude Opus 4.5 and GPT-5, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numbersGPT-5 wins on price. Benchmark data is unavailable for one or both models.
Price
GPT-5
Coding
Not called
Intelligence
Tied
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude Opus 4.5 wins
- More serving providers (7 vs 6)
GPT-5 wins
- Cheaper input ($5.00 vs $1.25 /1M)
- Cheaper output ($25.00 vs $10.00 /1M)
- Higher max output (64K vs 128K)
- Has web search
Cheaper overall
GPT-5
$1.25 + $10.00 /1M
Larger context
Tied
More providers
Claude Opus 4.5
7 providers
Pricing & specs
cheapest serving route · per 1M tokens| Claude Opus 4.5 | GPT-5 | |
|---|---|---|
| Input $/1M | $5.00 | $1.25 best |
| Output $/1M | $25.00 | $10.00 best |
| Context window | 410K | 410K |
| Max output | 64K | 128K best |
| Serving providers | 7 best | 6 |
| Released | 2025-11-24 | 2025-08-07 |
Benchmarks
Artificial Analysis indices, side by side| Claude Opus 4.5 | GPT-5 | |
|---|---|---|
| Intelligence | 34.7 | 34.7 |
| Coding | Not available | 37.8 |
| GPQA Diamond | 81% | 85% best |
| Output speed | 49 t/s | 69 t/s best |
| Latency (TTFT) | 3.62s best | 33.91s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Opus 4.5
via Azure
$50
GPT-5
via Databricks
$16
Capabilities
feature support, side by side| Feature | Claude Opus 4.5 | GPT-5 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Opus 4.5 or GPT-5?
GPT-5 is cheaper for input ($5.00 vs $1.25 per 1M tokens). GPT-5 is cheaper for output ($25.00 vs $10.00 per 1M tokens).
What is the context window difference between Claude Opus 4.5 and GPT-5?
Both Claude Opus 4.5 and GPT-5 have about a 410K-token context window.
How do Claude Opus 4.5 and GPT-5 compare on benchmarks?
On the tracked Artificial Analysis indices, they score about the same on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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