token.app › Compare › Claude Haiku 4.5 vs gpt-oss-120b
Claude Haiku 4.5 vs gpt-oss-120b
gpt-oss-120b leads on 3 of 3 shared benchmarks. gpt-oss-120b is 28× cheaper per token on a blended 3:1 basis. Claude Haiku 4.5 accepts the larger context window (200K).
Head to head
Blended price uses a 3:1 input:output mix
| Claude Haiku 4.5 | gpt-oss-120b | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input $/1M | $1.00 | $0.037 |
| Output $/1M | $5.00 | $0.170 |
| Blended $/1M | $2.00 | $0.070 |
| Context window | 200K | 131K |
| Max output | 64K | 131K |
| Released | Oct 2025 | Aug 2025 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 71.2% | 75.8% |
| SimpleQA Verified | 5.9% | 13.9% |
| OTIS Mock AIME | 66.7% | 88.9% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose Claude Haiku 4.5 if…
- Larger context window (200K)
- Newer model (released Oct 2025)
Choose gpt-oss-120b if…
- Costs less per token — $0.070 vs $2.00 blended
- Higher GPQA Diamond (75.8% vs 71.2%)
- Higher SimpleQA Verified (13.9% vs 5.9%)
- Higher OTIS Mock AIME (88.9% vs 66.7%)
- Open weights — self-hostable
FAQ
Which is better, Claude Haiku 4.5 or gpt-oss-120b?
Across the 3 benchmarks both models have independently-run scores for, Claude Haiku 4.5 leads on 0 and gpt-oss-120b leads on 3. Benchmarks are one input — price and context window are on this page too.
Is Claude Haiku 4.5 cheaper than gpt-oss-120b?
gpt-oss-120b is cheaper: $0.070 versus $2.00 per million tokens blended at 3:1 input:output. Input alone: $1.00 vs $0.037. Output alone: $5.00 vs $0.170.
What context windows do Claude Haiku 4.5 and gpt-oss-120b have?
Claude Haiku 4.5: 200,000 tokens. gpt-oss-120b: 131,072 tokens.
Who makes Claude Haiku 4.5 and gpt-oss-120b?
Claude Haiku 4.5 is made by Anthropic. gpt-oss-120b is made by OpenAI.
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