Model comparison
Claude Opus 4.7 vs GPT-OSS 20B
Head-to-head evidence from 14 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
BenchAlign evidence: Claude Opus 4.7 supported; GPT-OSS 20B supported. Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Opus 4.7 and GPT-OSS 20B share 14 comparable benchmark results. 0 of 8 categories are comparable. 8 results are unique to Claude Opus 4.7; 5 to GPT-OSS 20B.
Updated July 16, 2026- Shared results
- 14
- Claude Opus 4.7 only
- 8
- GPT-OSS 20B only
- 5
- Comparable categories
- 0 / 8
Benchmark data for Claude Opus 4.7 and GPT-OSS 20B is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 14 shared benchmark results across 6 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Claude Opus 4.7 is priced at $5.00 input / $25.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for GPT-OSS 20B. Claude Opus 4.7 has the larger context window at 1M, compared with 128K for GPT-OSS 20B.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Opus 4.7 | Δ | GPT-OSS 20B |
|---|---|---|---|
| Math | Claude Opus 4.738.6 | MarginNo overlap | GPT-OSS 20BNot measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Opus 4.7 | GPT-OSS 20B | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Opus 4.7$5 input / $25 output | GPT-OSS 20B$0 input / $0 output | GPT-OSS 20B has the lower combined listed price. |
| Generation speedtokens per second | Claude Opus 4.7Not available | GPT-OSS 20B313 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Opus 4.7Not available | GPT-OSS 20B0.65 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Opus 4.71M | GPT-OSS 20B128K | Claude Opus 4.7 lists the larger context window. |
Benchmark Deep Dive
Agentic8 benchmarks
| Benchmark | Claude Opus 4.7 | GPT-OSS 20B | Result |
|---|---|---|---|
| τ²-bench resultsSource | 74% | 60.2% | Claude Opus 4.7 leads |
| Gert LabsSource | 65.59% | — | Not comparable |
| ResearchClawBenchSource | 20.7% | — | Not comparable |
| OSWorld 2.0Source | 13.9% | — | Not comparable |
| AA Agentic IndexSource | — | 3.1% | Not comparable |
| APEX-Agents-AASource | — | 0.7% | Not comparable |
| GDPval-AASource | — | 3.0% | Not comparable |
| GDPval-AASource | — | 559 | Not comparable |
Coding6 benchmarks
| Benchmark | Claude Opus 4.7 | GPT-OSS 20B | Result |
|---|---|---|---|
| Vibe Code BenchSource | 71.00% | — | Not comparable |
| React Native EvalsSource | 82.8% | 71% | Claude Opus 4.7 leads |
| Terminal-Bench HardSource | 54.5% | 10.6% | Claude Opus 4.7 leads |
| AA-SciCodeSource | 50.1% | 34.4% | Claude Opus 4.7 leads |
| FrontierCodeSource | 38.5% | — | Not comparable |
| AA Coding IndexSource | — | 20.7% | Not comparable |
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Claude Opus 4.7 | GPT-OSS 20B | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 42.7% | 14.9% | Claude Opus 4.7 leads |
| AA-GPQA DiamondSource | 88.5% | 68.8% | Claude Opus 4.7 leads |
| AA-HLESource | 31.2% | 9.8% | Claude Opus 4.7 leads |
| AA-Omniscience IndexSource | 14.2% | -63.9% | Claude Opus 4.7 leads |
| AA-Omniscience AccuracySource | 43.5% | 15.5% | Claude Opus 4.7 leads |
| AA-Omniscience Hallucination RateSource | 51.9% | 94.1% | Claude Opus 4.7 leads |
Math2 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude Opus 4.7 | GPT-OSS 20B | Result |
|---|---|---|---|
| AA-IFBenchSource | 43.6% | 65.1% | GPT-OSS 20B leads |
Frequently Asked Questions (3)
Can I compare Claude Opus 4.7 and GPT-OSS 20B on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Claude Opus 4.7 and GPT-OSS 20B today?
Claude Opus 4.7: $5.00 input / $25.00 output per 1M tokens GPT-OSS 20B: $0.00 input / $0.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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