# Gemini 4 Hydrogen vs GPT-5.3 Codex

> Side-by-side benchmark comparison for Gemini 4 Hydrogen and GPT-5.3 Codex across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-4-hydrogen-vs-gpt-5-3-codex
- Last updated: November 12, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Gemini 4 Hydrogen and GPT-5.3 Codex.

## Summary

- Gemini 4 Hydrogen and GPT-5.3 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 | Gemini 4 Hydrogen | GPT-5.3 Codex |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 400K |
| Independent public score (not head-to-head) | null | 61.82 |
| Benchmarks Covered | 5 | 12 |
| Pricing (input/output) | $1.50 / $7.50 | $1.75 / $14.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 4 Hydrogen public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: 53.1 (Supported · #49/135)

| Benchmark | Gemini 4 Hydrogen | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| OSWorld 2.1 Offline | 77.6% | Coming soon | Coming soon |
| MKA | 53.4% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 51.4% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 77.3% | Coming soon |
| OSWorld-Verified | Coming soon | 64.7% | Coming soon |
| Gert Labs | Coming soon | 57.47% | Coming soon |
| JobBench | Coming soon | 33.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 4 Hydrogen public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: 51.6 (Supported · #41/161)

| Benchmark | Gemini 4 Hydrogen | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| FrontierCode 2.0 | 38.2% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 85% | Coming soon |
| SWE-bench Pro | Coming soon | 56.8% | Coming soon |
| SWE-Rebench | Coming soon | 58.2% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 77.3% | Coming soon |
| Vibe Code Bench | Coming soon | 61.77% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 87.3% | Coming soon |
| SWE-bench (Vals) | Coming soon | 78.0% | Coming soon |
| PostTrainBench v1 | Coming soon | 17.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 4 Hydrogen public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: 57.3 (Estimated · #40/160)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 4 Hydrogen public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: Coming soon

| Benchmark | Gemini 4 Hydrogen | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | 66.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 4 Hydrogen public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: 63.1 (Estimated · #37/180)

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 4 Hydrogen public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: 92.6 (#19/157)

## FAQ

### Can I compare Gemini 4 Hydrogen and GPT-5.3 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

- [Gemini 4 Hydrogen vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-gemini-4-hydrogen)
- [GPT-5.3 Codex vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-gpt-5-3-codex)
- [Gemini 4 Hydrogen vs Gemini 4 Argon](/compare/gemini-4-argon-vs-gemini-4-hydrogen)
- [GPT-5.3 Codex vs Gemini 4 Argon](/compare/gemini-4-argon-vs-gpt-5-3-codex)

## Explore More

- [Gemini 4 Hydrogen profile](/models/gemini-4-hydrogen)
- [GPT-5.3 Codex profile](/models/gpt-5-3-codex)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)