Claude Haiku 4.5 vs o4-mini
Claude Haiku 4.5 and o4-mini are both current production-tier models. o4-mini leads on coding, reasoning, general knowledge.
Specs side by side
| Metric | Anthropic Claude Haiku 4.5 | OpenAI o4-mini |
|---|---|---|
| Input price (per 1M) | $1 | $1.1 |
| Output price (per 1M) | $5 | $4.4 |
| Context window | 200k tokens | 200k tokens |
| Speed tier | fast | slow |
| Open weights | No | No |
| EU region | Yes | Yes |
| Free tier | No | No |
| Prompt caching | Yes | Yes |
| Vision input | Yes | Yes |
| Extended thinking | No | Yes |
When to choose each
Choose Claude Haiku 4.5 if…
- Low latency matters (fast vs slow)
Choose o4-mini if…
- Coding is central to your workload
- Reasoning is central to your workload
Benchmark delta
Claude Haiku 4.5 leads on
Claude Haiku 4.5 has no meaningful benchmark lead in this pair.
o4-mini leads on
- Coding
- Reasoning
- General knowledge
- Multilingual
- Vision
FAQ — Claude Haiku 4.5 vs o4-mini
Claude Haiku 4.5 vs o4-mini — which is better?
Claude Haiku 4.5 and o4-mini are both current production-tier models. o4-mini leads on coding, reasoning, general knowledge. The right pick depends on your use case — see "When to choose each" above for a data-driven decision.
How does Claude Haiku 4.5 pricing compare to o4-mini?
Claude Haiku 4.5 costs $1 / $5 per 1M vs o4-mini at $1.1 / $4.4 per 1M. o4-mini is cheaper on output tokens by roughly 14%. Both support prompt caching, which reduces effective cost by 80-90% on repeat system prompts.
Does Claude Haiku 4.5 or o4-mini have the bigger context window?
o4-mini has a 200k-token context window — 1× the 200k context of Claude Haiku 4.5. Enough for long reports and multi-document analysis.
Is there a free tier for Claude Haiku 4.5 or o4-mini?
Claude Haiku 4.5: no — No free API tier; new accounts get starter credits. o4-mini: no — Paid-only.
Which is better for coding — Claude Haiku 4.5 or o4-mini?
o4-mini leads on coding benchmarks (Claude Haiku 4.5: 82/100, o4-mini: 92/100). For production coding agents also weigh tool-use performance — Claude Haiku 4.5 scores 88, o4-mini scores 88.