Model comparison
Claude Opus 4.5 Thinking vs Gemma 4 26B A4B
Head-to-head evidence from 12 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Opus 4.5 Thinking #69 (Estimated); Gemma 4 26B A4B #67 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Opus 4.5 Thinking and Gemma 4 26B A4B share 12 comparable benchmark results. 0 of 8 categories are comparable. 4 results are unique to Claude Opus 4.5 Thinking; 8 to Gemma 4 26B A4B.
Updated July 23, 2026- Shared results
- 12
- Claude Opus 4.5 Thinking only
- 4
- Gemma 4 26B A4B only
- 8
- Comparable categories
- 0 / 8
Benchmark data for Claude Opus 4.5 Thinking and Gemma 4 26B A4B is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 12 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.
Gemma 4 26B A4B has the larger context window at 256K, compared with 200K for Claude Opus 4.5 Thinking.
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 4.5 Thinking | Δ | Gemma 4 26B A4B |
|---|---|---|---|
| Knowledge | Claude Opus 4.5 ThinkingNot measured | MarginNo overlap | Gemma 4 26B A4B43.4 |
| Multimodal | Claude Opus 4.5 ThinkingNot measured | MarginNo overlap | Gemma 4 26B A4B73.8 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Opus 4.5 Thinking | Gemma 4 26B A4B | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Opus 4.5 ThinkingNot available | Gemma 4 26B A4B$0 input / $0 output | A complete price comparison is not available. |
| Generation speedtokens per second | Claude Opus 4.5 ThinkingNot available | Gemma 4 26B A4BNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Opus 4.5 ThinkingNot available | Gemma 4 26B A4BNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Opus 4.5 Thinking200K | Gemma 4 26B A4B256K | Gemma 4 26B A4B lists the larger context window. |
Benchmark Deep Dive
Agentic4 benchmarks
Coding3 benchmarks
Reasoning2 benchmarks
Knowledge10 benchmarks
| Benchmark | Claude Opus 4.5 Thinking | Gemma 4 26B A4B | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 40.8% | 25.7% | Claude Opus 4.5 Thinking leads |
| AA-GPQA DiamondSource | 86.6% | 79.2% | Claude Opus 4.5 Thinking leads |
| AA-HLESource | 28.4% | 18.3% | Claude Opus 4.5 Thinking leads |
| AA-Omniscience IndexSource | 13.3% | -48.1% | Claude Opus 4.5 Thinking leads |
| AA-Omniscience AccuracySource | 45.7% | 18.2% | Claude Opus 4.5 Thinking leads |
| AA-Omniscience Hallucination RateSource | 59.8% | 80.9% | Claude Opus 4.5 Thinking leads |
| AA MMLU-ProSource | 89.5% | — | Not comparable |
| MMLU-ProSource | — | 82.6% | Not comparable |
| HLESource | — | 17.2% | Not comparable |
| HLE w/o toolsSource | — | 8.7% | Not comparable |
Multilingual1 benchmarks
| Benchmark | Claude Opus 4.5 Thinking | Gemma 4 26B A4B | Result |
|---|---|---|---|
| AA Global-MMLU-LiteSource | 91.3% | — | Not comparable |
Multimodal3 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude Opus 4.5 Thinking | Gemma 4 26B A4B | Result |
|---|---|---|---|
| AA-IFBenchSource | 58.0% | 72.4% | Gemma 4 26B A4B leads |
Frequently Asked Questions (3)
Can I compare Claude Opus 4.5 Thinking and Gemma 4 26B A4B 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 4.5 Thinking and Gemma 4 26B A4B today?
Gemma 4 26B A4B: $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.
Related Comparisons
Choose a model with this week’s evidence
Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.
One email each week. Unsubscribe anytime.