# Gemma 4 E4B vs GPT-5.1-Codex

> Side-by-side benchmark comparison for Gemma 4 E4B and GPT-5.1-Codex across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemma-4-e4b-vs-gpt-5-1-codex
- Last updated: September 4, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Gemma 4 E4B and GPT-5.1-Codex.

## Summary

- Gemma 4 E4B and GPT-5.1-Codex do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Gemma 4 E4B | GPT-5.1-Codex |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 128K | 400K |
| Independent public score (not head-to-head) | 42.92 | 51.62 |
| Benchmarks Covered | 2 | 3 |
| Pricing (input/output) | $0.00 / $0.00 | $1.25 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemma 4 E4B public-lane score: 45.9 (Estimated · #91/151)
- GPT-5.1-Codex public-lane score: 51.4 (Estimated · #54/151)

| Benchmark | Gemma 4 E4B | GPT-5.1-Codex | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | Coming soon | 49.68% | Coming soon |
| JobBench | Coming soon | 26.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemma 4 E4B public-lane score: 41.5 (Estimated · #131/183)
- GPT-5.1-Codex public-lane score: 47.4 (Estimated · #89/183)

| Benchmark | Gemma 4 E4B | GPT-5.1-Codex | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | Coming soon | 13.12% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemma 4 E4B public-lane score: 35.8 (Unranked · 1 rankable row)
- GPT-5.1-Codex public-lane score: 66.8 (Unranked · 1 rankable row)

### Reasoning

- Winner: Insufficient shared evidence
- Gemma 4 E4B public-lane score: 44.7 (Unranked · 2 rankable rows)
- GPT-5.1-Codex public-lane score: 70.6 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Gemma 4 E4B public-lane score: 39.3 (Estimated · #143/181)
- GPT-5.1-Codex public-lane score: 53.3 (Estimated · #69/181)

| Benchmark | Gemma 4 E4B | GPT-5.1-Codex | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 58.6% | Coming soon | Coming soon |
| MMLU-Pro | 69.4% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemma 4 E4B public-lane score: 51.8 (#77/120)
- GPT-5.1-Codex public-lane score: 85.3 (#42/120)

## FAQ

### Can I compare Gemma 4 E4B and GPT-5.1-Codex on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Gemma 4 E4B vs Gemma 4 31B](/compare/gemma-4-31b-vs-gemma-4-e4b)
- [GPT-5.1-Codex vs Gemma 4 31B](/compare/gemma-4-31b-vs-gpt-5-1-codex)
- [Gemma 4 E4B vs Gemma 4 26B A4B](/compare/gemma-4-26b-a4b-vs-gemma-4-e4b)
- [GPT-5.1-Codex vs Gemma 4 26B A4B](/compare/gemma-4-26b-a4b-vs-gpt-5-1-codex)

## Explore More

- [Gemma 4 E4B profile](/models/gemma-4-e4b)
- [GPT-5.1-Codex profile](/models/gpt-5-1-codex)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)