Gemini 3.1 vs Claude Sonnet 4.6 vs GPT-5.3 Codex: Developer Benchmark Comparison March 2026
Gemini 3.1 Pro, Claude Sonnet 4.6, and GPT-5.3 Codex all dropped within weeks of each other in early 2026. Here's how they actually compare on coding benchmarks, context windows, API pricing, and which model to use for what — a developer-first breakdown with real numbers.
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