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Side-by-side comparison of Claude Opus 4.5 and GPT-5.3. Claude Opus 4.5 scores 72 on quality benchmarks at $90.00/1M tokens. GPT-5.3 scores 70 at $12.00/1M tokens.
Claude Opus 4.5 has higher benchmark scores. GPT-5.3 offers competitive value at a lower price point. For budget-conscious users, go with GPT-5.3. For maximum quality, choose Claude Opus 4.5.
| Claude Opus 4.5 | GPT-5.3 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Tier | Frontier | Frontier |
| Quality Score | 72 | 70 |
| Input Price | $15.00/1M | $2.00/1M |
| Output Price | $75.00/1M | $10.00/1M |
| Speed | 40 tok/s | 80 tok/s |
| Context Window | 200K | 400K |
| Max Output | 32K | 64K |
| Reasoning | Yes | Yes |
| Vision | Yes | Yes |
| Task | Claude Opus 4.5 | GPT-5.3 | Savings |
|---|---|---|---|
| Coding | $175.50 | $23.40 | GPT-5.3 saves $152.10 |
| Writing | $46.80 | $6.24 | GPT-5.3 saves $40.56 |
| Analysis | $97.50 | $13.00 | GPT-5.3 saves $84.50 |
| Math & Reasoning | $58.50 | $7.80 | GPT-5.3 saves $50.70 |
| Creative | $39.00 | $5.20 | GPT-5.3 saves $33.80 |
| General Chat | $11.70 | $1.56 | GPT-5.3 saves $10.14 |