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 listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude Opus 4.5 wins on intelligence. GPT-5 wins on price. Benchmark data is unavailable for one or both models.
Price
GPT-5
Terminal-Bench
Not called
Intelligence
Claude Opus 4.5
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude Opus 4.5 wins
No clear edge on the tracked metrics.
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)
- More serving providers (7 vs 9)
- Has web search
Cheaper overall
GPT-5
$1.25 + $10.00 /1M
Larger context
Tied
More providers
GPT-5
9 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower.
| Claude Opus 4.5 | GPT-5 | |
|---|---|---|
| Input $/1M | $5.00via Anthropic | $1.25via Databricks best |
| Output $/1M | $25.00via Anthropic | $10.00via Databricks best |
| Context window | 410K | 410K |
| Max output | 64K | 128K best |
| Serving providers | 7 | 9 best |
| Date | Released Nov 24, 2025 | Released Aug 7, 2025 |
Benchmarks
Benchmark scores, side by side| Claude Opus 4.5 | GPT-5 | |
|---|---|---|
| Intelligence | 23.7 best | 23.0 |
| Terminal-Bench | Not available | 35% |
| GPQA Diamond | 81% | 85% best |
| Output speed | 46 t/s | 102 t/s best |
| Latency (TTFT) | 1.09s best | 78.80s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Opus 4.5
via Gmi
$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) from Databricks. GPT-5 is cheaper for output ($25.00 vs $10.00 per 1M tokens) from Databricks.
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 benchmarks, Claude Opus 4.5 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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