Model comparison
Gemma 4 E4B vs GPT-5.5 Pro
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Gemma 4 E4B #155 (Estimated); GPT-5.5 Pro #38 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Gemma 4 E4B and GPT-5.5 Pro share 1 comparable benchmark result. 1 of 8 categories are comparable. 13 results are unique to Gemma 4 E4B; 6 to GPT-5.5 Pro.
Updated July 22, 2026- Shared results
- 1
- Gemma 4 E4B only
- 13
- GPT-5.5 Pro only
- 6
- Comparable categories
- 1 / 8
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Gemma 4 E4B only becomes the better choice if knowledge is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
GPT-5.5 Pro is clearly ahead on the BenchAlign aggregate, 63.69 to 43.2. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Gemma 4 E4B. That is roughly Infinityx on output cost alone. GPT-5.5 Pro gives you the larger context window at 1M, compared with 128K for Gemma 4 E4B.
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 E4B | Δ | GPT-5.5 Pro |
|---|---|---|---|
| Knowledge | Gemma 4 E4B67.4 | Margin← 10.2 | GPT-5.5 Pro57.2 |
| Agentic | Gemma 4 E4BNot measured | MarginNo overlap | GPT-5.5 Pro90.1 |
| Math | Gemma 4 E4BNot measured | MarginNo overlap | GPT-5.5 Pro48.1 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemma 4 E4B | GPT-5.5 Pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemma 4 E4B$0 input / $0 output | GPT-5.5 Pro$30 input / $180 output | Gemma 4 E4B has the lower combined listed price. |
| Generation speedtokens per second | Gemma 4 E4BNot available | GPT-5.5 ProNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemma 4 E4BNot available | GPT-5.5 ProNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemma 4 E4B128K | GPT-5.5 Pro1M | GPT-5.5 Pro lists the larger context window. |
Benchmark Deep Dive
Agentic2 benchmarks
Coding1 benchmarks
| Benchmark | Gemma 4 E4B | GPT-5.5 Pro | Result |
|---|---|---|---|
| AA-SciCodeSource | 24.4% | — | Not comparable |
Reasoning2 benchmarks
KnowledgeGemma 4 E4B wins10 benchmarks
| Benchmark | Gemma 4 E4B | GPT-5.5 Pro | Result |
|---|---|---|---|
| GPQASource | 58.6% | — | Not comparable |
| MMLU-ProSource | 69.4% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 12.5% | — | Not comparable |
| AA-GPQA DiamondSource | 57.6% | — | Not comparable |
| AA-HLESource | 3.7% | — | Not comparable |
| AA-Omniscience IndexSource | -20.0% | — | Not comparable |
| AA-Omniscience AccuracySource | 8.6% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 31.3% | — | Not comparable |
| HLESource | — | 57.2% | Not comparable |
| HLE w/o toolsSource | — | 43.1% | Not comparable |
Math3 benchmarks
Multimodal1 benchmarks
| Benchmark | Gemma 4 E4B | GPT-5.5 Pro | Result |
|---|---|---|---|
| AA-MMMU-ProSource | 51.4% | — | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Gemma 4 E4B | GPT-5.5 Pro | Result |
|---|---|---|---|
| AA-IFBenchSource | 44.2% | — | Not comparable |
Frequently Asked Questions (2)
Which is better, Gemma 4 E4B or GPT-5.5 Pro?
GPT-5.5 Pro is ahead on BenchLM's BenchAlign leaderboard, 63.69 to 43.2.
Which is better for knowledge tasks, Gemma 4 E4B or GPT-5.5 Pro?
Gemma 4 E4B has the edge for knowledge tasks in this comparison, averaging 67.4 versus 57.2. GPT-5.5 Pro stays close enough that the answer can still flip depending on your workload.
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