Claude Haiku 4.5 vs o1
Pricing, benchmarks, and use case comparison
Quick take
- •Claude Haiku 4.5 is meaningfully stronger at speed (98 vs 30 on our capability index).
- •o1 is meaningfully stronger at math (88 vs 68).
- •Claude Haiku 4.5 is 93% cheaper on input tokens, which compounds fast on high-volume or agentic workloads.
- •Claude Haiku 4.5 has a 200K context window vs 200,000 tokens (100,000 max output) - better for whole-repo or long-document work.
Specs comparison
| Claude Haiku 4.5 | o1 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Type | Closed source | Closed source |
| Context window | ✓200K | 200,000 tokens (100,000 max output) |
| Input / 1M tokens | ✓$1.00 | $15.00 |
| Output / 1M tokens | $5.00 | $60.00 |
| Release date | 2025-10 | 2024-12 |
Benchmarks
| Benchmark | Claude Haiku 4.5 | o1 |
|---|---|---|
| SWE-bench Verified | 73.3% | - |
| GPQA | 64.6% | - |
| MMLU Pro | 80.0% | - |
| AIME 2024 | - | 74% |
| GPQA Diamond | - | 77.3% |
| Codeforces | - | ~89th percentile |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose Claude Haiku 4.5 if...
- →You need high throughput and low latency at minimal cost
- →You are fanning out many parallel sub-agents or worker calls
- →You want solid coding/computer-use quality without Opus/Sonnet pricing
- →Your task fits comfortably within a 200K context window
Choose o1 if...
- →Hard, multi-step math, science, and logic problems that reward deliberate reasoning
- →Competitive programming and algorithmic problem solving
- →Existing o1-based pipelines already validated for reasoning tasks