Anthropic: Claude Sonnet 5 vs OpenAI: GPT-5.2-Codex
Head-to-head API cost, context, and performance comparison. Synced at 8:13:00 PM.
Executive Summary
When evaluating Anthropic: Claude Sonnet 5 against OpenAI: GPT-5.2-Codex, the pricing structure is a key differentiator. Anthropic: Claude Sonnet 5 is approximately 24% more cost-effective per 1 million tokens overall.
However, when looking at raw reasoning capabilities, Anthropic: Claude Sonnet 5 leads with a statistical ELO score of 1588. For tasks involving complex logic, coding, or instruction-following, developers might prefer Anthropic: Claude Sonnet 5, provided their budget allows for the API burn rate.
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Raw Technical comparison
Verdict
If you are looking for pure performance and capability, Anthropic: Claude Sonnet 5 is statistically superior. However, if API burn rate is the primary concern, Anthropic: Claude Sonnet 5 wins out aggressively in pricing.
People Also Ask
Is Anthropic: Claude Sonnet 5 cheaper than OpenAI: GPT-5.2-Codex?
Yes. Anthropic: Claude Sonnet 5 is cheaper for both input and output generation compared to OpenAI: GPT-5.2-Codex. Exploring alternatives often yields cost reductions.
Which model has the larger context window?
The Anthropic: Claude Sonnet 5 model has the advantage in memory, offering a massive 1,000,000 token limit for document ingestion.