Claude Sonnet 5 vs GPT-5.6 Terra
Price, context and benchmark scores side by side — every number from the live model catalogue.
| Claude Sonnet 5anthropic | GPT-5.6 Terraopenai | |
|---|---|---|
| Input / 1M tokens | $2.00 | $1.25 |
| Output / 1M tokens | $10.00 | $7.50 |
| 1M in + 300K out | $5.00 | $3.50 |
| Context window | 1M | 1.1M |
| Intelligence index | 53.4 | 55.0 |
| Coding index | 71.5 | 76.7 |
| Agentic index | 46.7 | 47.4 |
| Cheapest provider | Azure | OpenAI |
| Providers serving it | 4 | 2 |
| Weights | Closed | Closed |
| Image input | Yes | Yes |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | Yes |
| Released | Jun 30, 2026 | Jul 9, 2026 |
Which one to pick
Pick Claude Sonnet 5 if…
- You want provider redundancy: 4 providers serve it.
Pick GPT-5.6 Terra if…
- You want the higher general-intelligence score (55.0).
- Code quality is the priority — it leads on the coding index (76.7).
- You are running agent loops — higher agentic index (47.4).
- Token cost matters: $7.50 per 1M output vs $10.00.
- You need the bigger context window (1.1M).
FAQ
Is Claude Sonnet 5 better than GPT-5.6 Terra?
GPT-5.6 Terra scores higher on general intelligence (53.4 vs 55.0), while GPT-5.6 Terra is 1.3× cheaper per output token ($7.50 vs $10.00). For code, GPT-5.6 Terra leads (76.7 coding index). GPT-5.6 Terra takes the larger context at 1.1M.
Which is cheaper, Claude Sonnet 5 or GPT-5.6 Terra?
GPT-5.6 Terra, at $7.50 per 1M output tokens versus $10.00. On a 1M input + 300K output workload that is $3.50 against $5.00.
Can I self-host Claude Sonnet 5 or GPT-5.6 Terra?
Claude Sonnet 5: closed weights, API only. GPT-5.6 Terra: closed weights, API only.