Model comparison
Codellama 34b Instruct vs GPT-5.1-Codex
GPT-5.1-Codex is the stronger model overall, scoring 38.6 to 30.8 on the Noometry Index.
Last verified . 0 shared benchmarks.
MetaSummary
- The widest gap is in coding, where GPT-5.1-Codex leads 41.9 to 28.5.
- Codellama 34b Instruct has downloadable open weights; the other is API-only.
Side by side
| Codellama 34b Instruct | GPT-5.1-Codex | |
|---|---|---|
| Provider | Meta | OpenAI |
| Noometry Index | 30.8 | 38.6 |
| Released | — | 2025-11-12 |
| Weights | Open | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $10 |
| Results tracked | 14 | 6 |
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Category by category
Coding GPT-5.1-Codex leads
Codellama 34b Instruct: 28.5 (#314), GPT-5.1-Codex: 41.9 (#116)
| Benchmark | Codellama 34b Instruct | GPT-5.1-Codex |
|---|---|---|
| SWE-bench Verified (bash only) | — | 66% |
| LMArena WebDev | — | 1337 |
| BigCodeBench Instruct | 29% | — |
| LMArena Coding | 1046 | — |
| BigCodeBench Complete | 37.1% | — |
| ALE-Bench | — | 1,245 |
| HumanEval+ | 43.9% | — |
| MBPP+ | 56.3% | — |
Agentic & Tool Use Not comparable
Codellama 34b Instruct: —, GPT-5.1-Codex: 38.0 (#33)
| Benchmark | Codellama 34b Instruct | GPT-5.1-Codex |
|---|---|---|
| Terminal-Bench | — | 60.4% |
| METR Time Horizons | — | 70.8% |
Reasoning Not comparable
Codellama 34b Instruct: 19.6 (#255), GPT-5.1-Codex: —
| Benchmark | Codellama 34b Instruct | GPT-5.1-Codex |
|---|---|---|
| LMArena Hard Prompts | 1032 | — |
Math Too close to call
Codellama 34b Instruct: 31.0 (#230), GPT-5.1-Codex: 30.3 (#235)
| Benchmark | Codellama 34b Instruct | GPT-5.1-Codex |
|---|---|---|
| ProofBench | — | 9% |
| LMArena Math | 1056 | — |
Multilingual Not comparable
Codellama 34b Instruct: 25.8 (#284), GPT-5.1-Codex: —
| Benchmark | Codellama 34b Instruct | GPT-5.1-Codex |
|---|---|---|
| LMArena Non-English | 1011 | — |
| LMArena Chinese | 976 | — |
Instruction Following Not comparable
Codellama 34b Instruct: 52.2 (#291), GPT-5.1-Codex: —
| Benchmark | Codellama 34b Instruct | GPT-5.1-Codex |
|---|---|---|
| LMArena Instruction Following | 1028 | — |
Long Context Not comparable
Codellama 34b Instruct: 30.9 (#284), GPT-5.1-Codex: —
| Benchmark | Codellama 34b Instruct | GPT-5.1-Codex |
|---|---|---|
| LMArena Longer Query | 1013 | — |
Writing & Preference Not comparable
Codellama 34b Instruct: 28.2 (#297), GPT-5.1-Codex: —
| Benchmark | Codellama 34b Instruct | GPT-5.1-Codex |
|---|---|---|
| LMArena Text | 1066 | — |
| LMArena Creative Writing | 1032 | — |
| LMArena Multi-Turn | 1015 | — |
Frequently asked questions
Is Codellama 34b Instruct better than GPT-5.1-Codex?
GPT-5.1-Codex is the stronger model overall, scoring 38.6 to 30.8 on the Noometry Index.
Is Codellama 34b Instruct or GPT-5.1-Codex better for coding?
GPT-5.1-Codex scores higher on coding benchmarks: 41.9 versus 28.5 in the Noometry coding category.
How many benchmarks do Codellama 34b Instruct and GPT-5.1-Codex share?
0 benchmarks have published results for both models. Codellama 34b Instruct has 14 scored results on Noometry and GPT-5.1-Codex has 6.