Claude Haiku 4.5 vs GPT-5.4 mini: which is better?

Claude Haiku 4.5 (Anthropic) and GPT-5.4 mini (OpenAI) differ in intelligence, speed, and capabilities — see the comparison table for details, or run both live in EVA.

Claude Haiku 4.5 vs GPT-5.4 mini

Anthropic vs OpenAI — compared on intelligence, speed, and capabilities.

	Claude Haiku 4.5	GPT-5.4 mini
Intelligence	80	82
Speed	92	93

Claude Haiku 4.5

Anthropic's smallest and fastest model in the Claude 4.5 lineup, optimized for low cost, low latency, and real-time responsiveness, while delivering near-frontier performance on coding, agentic workflows, and extended reasoning tasks.

✓ reasoning
✓ temperature
✓ web search
✓ reasoning effort
✓ vision
✓ documents

GPT-5.4 mini

OpenAI's strongest mini model for coding, computer use, and subagents. Brings the strengths of GPT-5.4 to a faster, more efficient model designed for high-volume workloads.

✓ reasoning
✓ web search
✓ reasoning effort
✓ vision
✓ documents
✓ image generation

Run the same prompt on both, side by side