Model comparison
Gemini 4 Argon vs GPT-5.1-Codex
Gemini 4 Argon is the stronger model overall, scoring 56.5 to 38.6 on the Noometry Index.
Last verified . 2 shared benchmarks.
GoogleSummary
- They share 2 benchmarks with published results for both. Gemini 4 Argon scores higher in 3 categories and GPT-5.1-Codex in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 4 Argon leads 73.9 to 30.3.
- The biggest single-benchmark swing is ProofBench: 99% for Gemini 4 Argon and 9% for GPT-5.1-Codex.
Side by side
| Gemini 4 Argon | GPT-5.1-Codex | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 56.5 | 38.6 |
| Released | 2026-09-30 | 2025-11-12 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $10 |
| Results tracked | 21 | 6 |
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Category by category
Coding Gemini 4 Argon leads
Gemini 4 Argon: 62.0 (#9), GPT-5.1-Codex: 41.9 (#116)
| Benchmark | Gemini 4 Argon | GPT-5.1-Codex |
|---|---|---|
| LMArena WebDev | 1678 | 1337 |
| SWE-bench Verified (bash only) | — | 66% |
| FrontierSWE | 55% | — |
| SciCode | 61.8% | — |
| LMArena Coding | 1550 | — |
| ALE-Bench | — | 1,245 |
Agentic & Tool Use Gemini 4 Argon leads
Gemini 4 Argon: 49.2 (#8), GPT-5.1-Codex: 38.0 (#33)
| Benchmark | Gemini 4 Argon | GPT-5.1-Codex |
|---|---|---|
| Terminal-Bench | — | 60.4% |
| APEX-Agents | 82.2% | — |
| METR Time Horizons | — | 70.8% |
| Vending-Bench 2 | 13,718 | — |
Reasoning Not comparable
Gemini 4 Argon: 44.2 (#47), GPT-5.1-Codex: —
| Benchmark | Gemini 4 Argon | GPT-5.1-Codex |
|---|---|---|
| CritPt | 27.1% | — |
| LMArena Hard Prompts | 1548 | — |
Math Gemini 4 Argon leads
Gemini 4 Argon: 73.9 (#17), GPT-5.1-Codex: 30.3 (#235)
| Benchmark | Gemini 4 Argon | GPT-5.1-Codex |
|---|---|---|
| ProofBench | 99% | 9% |
| LMArena Math | 1536 | — |
Knowledge Not comparable
Gemini 4 Argon: 43.9 (#89), GPT-5.1-Codex: —
| Benchmark | Gemini 4 Argon | GPT-5.1-Codex |
|---|---|---|
| LMArena Expert | 1553 | — |
Multimodal Not comparable
Gemini 4 Argon: 46.5 (#14), GPT-5.1-Codex: —
| Benchmark | Gemini 4 Argon | GPT-5.1-Codex |
|---|---|---|
| Blueprint-Bench 2 | 54.4% | — |
Multilingual Not comparable
Gemini 4 Argon: 60.3 (#1), GPT-5.1-Codex: —
| Benchmark | Gemini 4 Argon | GPT-5.1-Codex |
|---|---|---|
| LMArena Non-English | 1523 | — |
| LMArena Chinese | 1610 | — |
| LMArena Russian | 1537 | — |
| LMArena Spanish | 1497 | — |
Instruction Following Not comparable
Gemini 4 Argon: 80.1 (#2), GPT-5.1-Codex: —
| Benchmark | Gemini 4 Argon | GPT-5.1-Codex |
|---|---|---|
| LMArena Instruction Following | 1538 | — |
Long Context Not comparable
Gemini 4 Argon: 47.6 (#15), GPT-5.1-Codex: —
| Benchmark | Gemini 4 Argon | GPT-5.1-Codex |
|---|---|---|
| LMArena Longer Query | 1549 | — |
Writing & Preference Not comparable
Gemini 4 Argon: 71.4 (#19), GPT-5.1-Codex: —
| Benchmark | Gemini 4 Argon | GPT-5.1-Codex |
|---|---|---|
| LMArena Text | 1534 | — |
| LMArena Creative Writing | 1531 | — |
| LMArena Multi-Turn | 1557 | — |
Frequently asked questions
Is Gemini 4 Argon better than GPT-5.1-Codex?
Gemini 4 Argon is the stronger model overall, scoring 56.5 to 38.6 on the Noometry Index.
Is Gemini 4 Argon or GPT-5.1-Codex better for coding?
Gemini 4 Argon scores higher on coding benchmarks: 62.0 versus 41.9 in the Noometry coding category.
How many benchmarks do Gemini 4 Argon and GPT-5.1-Codex share?
2 benchmarks have published results for both models. Gemini 4 Argon has 21 scored results on Noometry and GPT-5.1-Codex has 6.