Anthropic Claude Sonnet 4.6 VS OpenAI GPT-5.6 Terra
Decision Recommendation
👑 Editorial Verdict: GPT-5.6 Terra strictly dominates Claude Sonnet 4.6 across all compared dimensions. It is not only more cost-effective (blended cost of $5.63 vs $6.00 per 1M tokens) but also delivers superior coding accuracy (63.4% vs 0% on SWE-bench). Unless you have platform lock-in, GPT-5.6 Terra is the clear and optimal choice for all development workloads.
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Model Specs
Claude Sonnet 4.6
Benchmarks & Scores
Coding (swe-bench-pro)
N/Aexcellent at multi-file repositories, autonomous agents, and industrial codebases
Reasoning (gpqa-diamond)
79.9%graduate-level science QA
Cost & Performance
Cost (per 1M tokens)
$6.00Input: $3.00 | Output: $15.00Context Window
1M tokensModel Specs
GPT-5.6 Terra
Benchmarks & Scores
Coding (swe-bench-pro)
63.4%excellent at multi-file repositories, autonomous agents, and industrial codebases
Reasoning (gpqa-diamond)Winner (+13.0%)
92.9%graduate-level science QA
Cost & Performance
Cost (per 1M tokens)1.1x cheaper
$5.63Input: $2.50 | Output: $15.00Context WindowLarger
1.05M tokensFrequently Asked Questions about Claude Sonnet 4.6 vs GPT-5.6 Terra comparison
GPT-5.6 Terra is cheaper than Claude Sonnet 4.6. GPT-5.6 Terra has a blended cost of $5.63/1M tokens, which is about 1.1x cheaper than Claude Sonnet 4.6 at $6.00/1M tokens.
GPT-5.6 Terra is better for coding tasks on this benchmark. It scores 63.4% on swe-bench-pro (excellent at multi-file repositories, autonomous agents, and industrial codebases) compared to Claude Sonnet 4.6 which scores N/A.
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