Claude Haiku 4.5 vs GPT 5.4 Mini
Direct comparison between anthropic and openai for chat models. Specs, prices, strengths, weaknesses — decide on facts.
At a glance
- · Cheaper: GPT 5.4 Mini
- · Longer context window: GPT 5.4 Mini at 400,000 tokens
- · Claude Haiku 4.5: Very cheap per million tokens — good for bulk workloads
- · GPT 5.4 Mini: Fraction of GPT-5.4 cost with very similar tool-use quality
Spec comparison
| Spec | Claude Haiku 4.5 | GPT 5.4 Mini |
|---|---|---|
| Provider | anthropic | openai |
| Input per 1M tokens | $1.00 / 1M | $0.75 / 1M |
| Output per 1M tokens | $5.00 / 1M | $4.50 / 1M |
| Context window | 200,000 tok | 400,000 tok |
| Max output | 8,192 tok | 16,384 tok |
| Knowledge cutoff | 2025-07 | 2026-01 |
| Vision | ||
| Tool calling | ||
| JSON mode | ||
| Structured output |
Claude Haiku 4.5 — strengths
- +Very cheap per million tokens — good for bulk workloads
- +Low latency, comparable to Gemini 3 Flash
- +Vision-capable — rare in this price tier
GPT 5.4 Mini — strengths
- +Fraction of GPT-5.4 cost with very similar tool-use quality
- +Low latency — good for realtime chat and inline completion
- +Same 400k context window as the full-size model
Claude Haiku 4.5 — weaknesses
- −Weaker on multi-step reasoning than Sonnet
- −Only 8k output tokens — no full files in one response
GPT 5.4 Mini — weaknesses
- −No dedicated reasoning mode — complex math degrades
- −On very long tool-call chains, drift detection is weaker