Model comparison
Gemma 4 E2B vs Gemma 4 E4B
Head-to-head evidence from 14 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Sibling matchup inside the Gemma 4 family.
Public leaderboard positions: Gemma 4 E2B #162 (Estimated); Gemma 4 E4B #155 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Gemma 4 E2B and Gemma 4 E4B share 14 comparable benchmark results. 1 of 8 categories are comparable. 0 results are unique to Gemma 4 E2B; 0 to Gemma 4 E4B.
Updated July 23, 2026- Shared results
- 14
- Gemma 4 E2B only
- 0
- Gemma 4 E4B only
- 0
- Comparable categories
- 1 / 8
Gemma 4 E2B makes more sense if you want this variant’s specific profile, while Gemma 4 E4B is the cleaner fit if knowledge is the priority.
Confidence note. This is a partial-evidence comparison with 14 shared benchmark results across 6 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Gemma 4 E2B and Gemma 4 E4B sit in the same Gemma 4 family. This page is less about two unrelated model lineages and more about how the siblings trade off on benchmark shape, token costs, and practical limits like context window.
Gemma 4 E4B has the cleaner BenchAlign overall profile here, landing at 43.2 versus 41.82. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
Gemma 4 E4B's sharpest advantage is in knowledge, where it averages 67.4 against 56.9. The single biggest benchmark swing on the page is GPQA, 43.4% to 58.6%.
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 | Gemma 4 E2B | Δ | Gemma 4 E4B |
|---|---|---|---|
| Knowledge | Gemma 4 E2B56.9 | Margin→ 10.5 | Gemma 4 E4B67.4 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
GPQA
KnowledgeA 43.4%B 58.6%Winner: Gemma 4 E4BΔ 15.2GPQA: Gemma 4 E2B scored 43.4%; Gemma 4 E4B scored 58.6%. Gemma 4 E4B wins this benchmark. - Source ↗
MMLU-Pro
KnowledgeA 60%B 69.4%Winner: Gemma 4 E4BΔ 9.4MMLU-Pro: Gemma 4 E2B scored 60%; Gemma 4 E4B scored 69.4%. Gemma 4 E4B wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemma 4 E2B | Gemma 4 E4B | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemma 4 E2B$0 input / $0 output | Gemma 4 E4B$0 input / $0 output | Listed prices are equal. |
| Generation speedtokens per second | Gemma 4 E2BNot available | Gemma 4 E4BNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemma 4 E2BNot available | Gemma 4 E4BNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemma 4 E2B128K | Gemma 4 E4B128K | Listed context windows are equal. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | Gemma 4 E2B | Gemma 4 E4B | Result |
|---|---|---|---|
| τ²-bench resultsSource | 20.8% | 20.8% | Tie |
Coding1 benchmarks
| Benchmark | Gemma 4 E2B | Gemma 4 E4B | Result |
|---|---|---|---|
| AA-SciCodeSource | 20.9% | 24.4% | Gemma 4 E4B leads |
Reasoning2 benchmarks
KnowledgeGemma 4 E4B wins8 benchmarks
| Benchmark | Gemma 4 E2B | Gemma 4 E4B | Result |
|---|---|---|---|
| GPQASource | 43.4% | 58.6% | Gemma 4 E4B leads |
| MMLU-ProSource | 60% | 69.4% | Gemma 4 E4B leads |
| Artificial Analysis Intelligence IndexSource | 9.3% | 12.5% | Gemma 4 E4B leads |
| AA-GPQA DiamondSource | 37.5% | 57.6% | Gemma 4 E4B leads |
| AA-HLESource | 4.8% | 3.7% | Gemma 4 E2B leads |
| AA-Omniscience IndexSource | -24.0% | -20.0% | Gemma 4 E4B leads |
| AA-Omniscience AccuracySource | 6.7% | 8.6% | Gemma 4 E4B leads |
| AA-Omniscience Hallucination RateSource | 32.9% | 31.3% | Gemma 4 E4B leads |
Multimodal1 benchmarks
| Benchmark | Gemma 4 E2B | Gemma 4 E4B | Result |
|---|---|---|---|
| AA-MMMU-ProSource | 44.6% | 51.4% | Gemma 4 E4B leads |
Inst. Following1 benchmarks
| Benchmark | Gemma 4 E2B | Gemma 4 E4B | Result |
|---|---|---|---|
| AA-IFBenchSource | 35.1% | 44.2% | Gemma 4 E4B leads |
Frequently Asked Questions (2)
Which is better, Gemma 4 E2B or Gemma 4 E4B?
Gemma 4 E2B and Gemma 4 E4B are sibling variants in the Gemma 4 family, so the right pick depends on whether you value the better benchmark line, cheaper tokens, or the larger context window. Gemma 4 E4B is ahead on BenchLM's BenchAlign leaderboard 43.2 to 41.82.
Which is better for knowledge tasks, Gemma 4 E2B or Gemma 4 E4B?
Gemma 4 E4B has the edge for knowledge tasks in this comparison, averaging 67.4 versus 56.9. Inside this category, AA-GPQA Diamond is the benchmark that creates the most daylight between them.
Related Comparisons
Explore More
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.