Model comparison
Gemma 3 1B vs GPT-5.3 Codex
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 21.1 on the Noometry Index.
Last verified . 0 shared benchmarks.
GoogleSummary
- The widest gap is in agentic & tool use, where GPT-5.3 Codex leads 48.0 to 13.7.
- Gemma 3 1B has downloadable open weights; the other is API-only.
Side by side
| Gemma 3 1B | GPT-5.3 Codex | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 21.1 | 45.8 |
| Released | 2025-03-12 | 2026-02-05 |
| Weights | Open | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 4 | 8 |
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Category by category
Coding Not comparable
Gemma 3 1B: —, GPT-5.3 Codex: 48.6 (#56)
| Benchmark | Gemma 3 1B | GPT-5.3 Codex |
|---|---|---|
| SWE-bench Verified | — | 74.8% |
| LMArena WebDev | — | 1409 |
| WeirdML | — | 79.3% |
| ALE-Bench | — | 1,655 |
Agentic & Tool Use GPT-5.3 Codex leads
Gemma 3 1B: 13.7 (#152), GPT-5.3 Codex: 48.0 (#9)
| Benchmark | Gemma 3 1B | GPT-5.3 Codex |
|---|---|---|
| Terminal-Bench | — | 78.4% |
| Berkeley Function Calling Leaderboard | 7.2% | — |
| METR Time Horizons | — | 74.5% |
| Vending-Bench 2 | — | 5,940 |
Reasoning Not comparable
Gemma 3 1B: 19.2 (#264), GPT-5.3 Codex: —
| Benchmark | Gemma 3 1B | GPT-5.3 Codex |
|---|---|---|
| Chess Puzzles | 0% | — |
| Epoch Capabilities Index | — | 156.77 |
Math Not comparable
Gemma 3 1B: 10.2 (#316), GPT-5.3 Codex: —
| Benchmark | Gemma 3 1B | GPT-5.3 Codex |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.1% | — |
Knowledge Not comparable
Gemma 3 1B: 7.0 (#314), GPT-5.3 Codex: —
| Benchmark | Gemma 3 1B | GPT-5.3 Codex |
|---|---|---|
| GPQA Diamond | 19.9% | — |
Frequently asked questions
Is Gemma 3 1B better than GPT-5.3 Codex?
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 21.1 on the Noometry Index.
How many benchmarks do Gemma 3 1B and GPT-5.3 Codex share?
0 benchmarks have published results for both models. Gemma 3 1B has 4 scored results on Noometry and GPT-5.3 Codex has 8.