Model comparison
GPT-5-Codex vs Olmo 7b Instruct
GPT-5-Codex is the stronger model overall, scoring 37.9 to 30.3 on the Noometry Index.
Last verified . 0 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- The widest gap is in coding, where GPT-5-Codex leads 42.4 to 29.6.
- Olmo 7b Instruct has downloadable open weights; the other is API-only.
Side by side
| GPT-5-Codex | Olmo 7b Instruct | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 37.9 | 30.3 |
| Released | 2025-09-15 | — |
| Weights | Proprietary | Open |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 3 | 10 |
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Category by category
Coding GPT-5-Codex leads
GPT-5-Codex: 42.4 (#103), Olmo 7b Instruct: 29.6 (#303)
| Benchmark | GPT-5-Codex | Olmo 7b Instruct |
|---|---|---|
| WeirdML | 54.5% | — |
| LMArena Coding | — | 1016 |
Agentic & Tool Use Not comparable
GPT-5-Codex: 31.0 (#72), Olmo 7b Instruct: —
| Benchmark | GPT-5-Codex | Olmo 7b Instruct |
|---|---|---|
| Terminal-Bench | 44.3% | — |
Reasoning GPT-5-Codex leads
GPT-5-Codex: 30.9 (#83), Olmo 7b Instruct: 18.8 (#274)
| Benchmark | GPT-5-Codex | Olmo 7b Instruct |
|---|---|---|
| Kagi LLM Benchmark | 70.3% | — |
| LMArena Hard Prompts | — | 993 |
Math Not comparable
GPT-5-Codex: —, Olmo 7b Instruct: 30.2 (#237)
| Benchmark | GPT-5-Codex | Olmo 7b Instruct |
|---|---|---|
| LMArena Math | — | 1018 |
Multilingual Not comparable
GPT-5-Codex: —, Olmo 7b Instruct: 24.0 (#291)
| Benchmark | GPT-5-Codex | Olmo 7b Instruct |
|---|---|---|
| LMArena Non-English | — | 977 |
| LMArena Chinese | — | 1014 |
| LMArena Russian | — | 947 |
Instruction Following Not comparable
GPT-5-Codex: —, Olmo 7b Instruct: 49.0 (#301)
| Benchmark | GPT-5-Codex | Olmo 7b Instruct |
|---|---|---|
| LMArena Instruction Following | — | 978 |
Writing & Preference Not comparable
GPT-5-Codex: —, Olmo 7b Instruct: 25.8 (#303)
| Benchmark | GPT-5-Codex | Olmo 7b Instruct |
|---|---|---|
| LMArena Text | — | 1032 |
| LMArena Creative Writing | — | 990 |
| LMArena Multi-Turn | — | 1007 |
Frequently asked questions
Is GPT-5-Codex better than Olmo 7b Instruct?
GPT-5-Codex is the stronger model overall, scoring 37.9 to 30.3 on the Noometry Index.
Is GPT-5-Codex or Olmo 7b Instruct better for coding?
GPT-5-Codex scores higher on coding benchmarks: 42.4 versus 29.6 in the Noometry coding category.
How many benchmarks do GPT-5-Codex and Olmo 7b Instruct share?
0 benchmarks have published results for both models. GPT-5-Codex has 3 scored results on Noometry and Olmo 7b Instruct has 10.