Compare models
Put models side by side on price, context, capabilities, and benchmarks.
GPT-5.1-Codex-Max is OpenAI's frontier agentic coding model, using a compaction technique to coherently work across millions of tokens in a single task. It targets project-scale refactors, extended debugging sessions, and multi-hour autonomous coding loops.
Claude Haiku 4.5 is Anthropic's fast, affordable small model in the Claude 4 generation, balancing strong instruction-following and coding ability with low latency. It is designed for high-throughput agentic and chat applications where speed and cost efficiency are priorities.
Benchmarks
Head-to-head scores across reasoning, coding, and agentic indices, plus per-domain rankings.