Comparison · 2026-05-12
Claude Opus 4.5 (latest) vs GPT-5
Side-by-side comparison of pricing, context window and capabilities for Claude Opus 4.5 (latest) (Anthropic) and GPT-5 (OpenAI). Focus: flagship.
| Claude Opus 4.5 (latest) | GPT-5 | |
|---|---|---|
| Vendor | Anthropic | OpenAI |
| Input price / 1M tokens | $5.00 | $1.25 |
| Output price / 1M tokens | $25.00 | $10.00 |
| Total per 1M (in + out) | $30.00 | $11.25 |
| Context window | 200K | 400K |
| Max output tokens | 64K | 128K |
| Tool calling | ✓ Yes | ✓ Yes |
| Structured output | Unknown | ✓ Yes |
| Reasoning | ✓ Yes | ✓ Yes |
| Vision input | ✓ Yes | ✓ Yes |
| Open weights | ✗ No | ✗ No |
| Provider availability | 16 providers | 20 providers |
| Release date | 2025-11-24 | 2025-08-07 |
| Knowledge cutoff | 2025-03-31 | 2024-09-30 |
Quick takeaway
- GPT-5 is 2.7× cheaper per 1M tokens (input + output combined).
- GPT-5 has a larger context window (400K vs 200K).
- Only GPT-5 supports structured output / JSON mode.
- GPT-5 is more widely available across providers (20 vs 16).
Last updated:
Prices in USD per 1M tokens. Unknown means the provider does not publish per-token pricing.
Data is sourced from models.dev and normalized for comparison. Prices and capabilities may change. Always verify critical production decisions with the provider's official documentation.