Claude Opus 4.1 vs gpt-oss-120b
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Anthropic · Aug 2025
The last $15/$75-priced Opus — a 2025 flagship now thoroughly superseded by cheaper, stronger successors.
OpenAI · Aug 2025
OpenAI's open-weights MoE reasoning model under Apache 2.0 — near o4-mini quality, runnable on a single 80GB GPU.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: gpt-oss-120b works out roughly 150x cheaper per blended million tokens. Claude Opus 4.1 also takes 200K of context versus 131K for gpt-oss-120b. And gpt-oss-120b is open-weights (Apache 2.0), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
Specs & pricing
| Claude Opus 4.1 | gpt-oss-120b | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $15 | $0.1 |
| Output price / 1M | $75 | $0.5 |
| Context window | 200K | 131K |
| Max output | 32K | 131K |
| Open weights | no | yes (Apache 2.0) |
| Reasoning model | yes | yes |
| Multimodal input | text, image | text |
| Knowledge cutoff | Mar 2025 | Jun 2024 |
| Released | Aug 2025 | Aug 2025 |
| Example monthly cost* | $262.50 | $1.75 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Claude Opus 4.1 or gpt-oss-120b?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: gpt-oss-120b works out roughly 150x cheaper per blended million tokens. Claude Opus 4.1 also takes 200K of context versus 131K for gpt-oss-120b. And gpt-oss-120b is open-weights (Apache 2.0), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
- Which is cheaper, Claude Opus 4.1 or gpt-oss-120b?
- Claude Opus 4.1 costs $15/$75 per million input/output tokens, while gpt-oss-120b costs $0.1/$0.5. For a typical workload of 10M input and 1.5M output tokens per month, that's $262.50 versus $1.75.
- Which model is better for coding, Claude Opus 4.1 or gpt-oss-120b?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.