Claude Sonnet 5 vs GPT-5.6 Terra: Specs & Benchmark Comparison
| Characteristic | Claude Sonnet 5 | GPT-5.6 Terra |
|---|---|---|
| Company | Anthropic | OpenAI |
| Release Date | June 30, 2026 | July 9, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.1M |
| Context (output) | 64K | 128K |
| Input Price / 1M | $2.00 | $2.00 |
| Output Price / 1M | $10.00 | $12.00 |
| Average Score | 0.6 | 0.6 |
| Benchmarks | ||
| GDP.pdf | 0.8 | 0.2 |
| BenchCAD | 0.4 | 0.6 |
| DeepSWE 1.1 | 0.5 | 0.7 |
| BrowseComp | 0.8 | 0.9 |
| AutomationBench | 0.1 | 0.2 |
| FrontierCode 1.1 | 0.4 | 0.4 |
| Toolathlon | 0.5 | 0.5 |
| SWE-Bench Pro | 0.6 | 0.6 |
| HealthBench Professional | 0.6 | 0.6 |
Visual Benchmark Comparison
Claude Sonnet 5
GPT-5.6 Terra
GDP.pdf0.8 vs 0.2
0.8
0.2
BenchCAD0.4 vs 0.6
0.4
0.6
DeepSWE 1.10.5 vs 0.7
0.5
0.7
BrowseComp0.8 vs 0.9
0.8
0.9
AutomationBench0.1 vs 0.2
0.1
0.2
FrontierCode 1.10.4 vs 0.4
0.4
0.4
Toolathlon0.5 vs 0.5
0.5
0.5
SWE-Bench Pro0.6 vs 0.6
0.6
0.6
HealthBench Professional0.6 vs 0.6
0.6
0.6
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: Claude Sonnet 5 — 0.6, GPT-5.6 Terra — 0.6.
API Cost
Claude Sonnet 5 is 1.2x cheaper: input $2.00/1M vs $2.00/1M tokens.
Context Window
GPT-5.6 Terra supports a larger context: 1M vs 1M tokens.
Recency
Both models were released around the same time: 6/30/2026 and 7/9/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — Claude Sonnet 5 or GPT-5.6 Terra?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Claude Sonnet 5 or GPT-5.6 Terra?
Claude Sonnet 5 is cheaper for input: $2.00 per 1M tokens vs $2.00.
Which has a larger context window — Claude Sonnet 5 or GPT-5.6 Terra?
GPT-5.6 Terra supports a larger context: 1,050,000 tokens vs 1,000,000.
The Claude Sonnet 5 and GPT-5.6 Terra comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Sonnet 5 or GPT-5.6 Terra page. See also the complete list of AI model comparisons.