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Claude Opus 5.5 vs GPT-6 Astra
Claude Opus 5.5 vs GPT-6 Astra: Capability, Speed & Real Cost Comparison (2026)
Deep Reasoning & Architecture Showdown: Claude Opus 5.5 vs GPT-6 Astra
Bottom Line: Pick Claude Opus 5.5 for maximum capability (97 vs 95); pick Claude Opus 5.5 for lower token spend ($4 in / $20 out per 1M); Claude Opus 5.5 leads in generation speed (~98 TPS).
| Dimension | Claude Opus 5.5 | GPT-6 Astra |
|---|---|---|
| Release Date | 2026-09-22 | 2026-09-04 |
| A · Overall Capability | 97/100 | 95/100 |
| 💻 Coding & Agents | 98/100 | 98/100 |
| ✍️ Writing & Copywriting | 96/100 | 83/100 |
| 📚 Long-Doc & Knowledge Base | 95/100 | 91/100 |
| 👁️ Vision & Multimodal | 95/100 | 94/100 |
| F · Generation Speed | 98 Token/s (86/100) | 73 Token/s (83/100) |
| R · Access & CN Grade | B | A |
| Input / Output ($/1M) | $4 / $20 | $10 / $50 |
| Cache Read Price ($/1M) | $0.2 | $1 |
| Context Window | 1M | 1M |
OVERLAID F.A.R.E. RADAR CHART
■ Claude Opus 5.5
■ GPT-6 Astra
Ideal Use Cases for Claude Opus 5.5
Choose Claude Opus 5.5 when: Top-tier empirical capability score (97 index) and its channel pricing ($4/M input) fits your budget.
Ideal Use Cases for GPT-6 Astra
Choose GPT-6 Astra when: Top-tier empirical capability score (95 index) or better cost efficiency for your workload.