Claude Haiku 4.5 vs o1
2026 - Pricing, benchmarks, and use case comparison
Quick take
- •Claude Haiku 4.5 is 95% cheaper on input tokens - better for high-volume workloads.
Specs comparison
| Claude Haiku 4.5 | o1 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Type | Closed source | Closed source |
| Context window | 200K | 200K |
| Input / 1M tokens | ✓$0.80 | $15.00 |
| Output / 1M tokens | $4.00 | $60.00 |
| Release date | 2025-10 | 2024-09 |
Benchmarks
| Benchmark | Claude Haiku 4.5 | o1 |
|---|---|---|
| MMLU | ~82% | - |
| HumanEval | ~88% | 92.4% |
| GPQA Diamond | - | 78.3% |
| SWE-bench Verified | - | 48.9% |
Scores sourced from official provider release posts.
Strengths
Claude Haiku 4.5
- ✓Lowest latency in the Claude lineup
- ✓Extremely cost-effective at scale
- ✓Strong at classification and extraction
- ✓Good at following structured output schemas
- ✓Handles 200K context at low cost
o1
- ✓Best-in-class math and physics
- ✓Strong competitive coding (Codeforces, HumanEval)
- ✓Scientific reasoning (GPQA top performer)
- ✓Multi-step logic and planning
- ✓200K context for long technical documents
Which should you choose?
Choose Claude Haiku 4.5 if you need...
- →High-volume API pipelines
- →Real-time classification
- →Form and document extraction
- →Low-latency chatbots
Choose o1 if you need...
- →Math and science problems
- →Competitive programming
- →Complex multi-step reasoning
- →Research assistance