Model comparison
GPT-5.2 Codex vs Nova Premier 1.0
GPT-5.2 Codex is the stronger model overall, scoring 42.2 to 37.7 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- Both cost about the same: $1.75 input and $14 output per million tokens.
- Nova Premier 1.0 accepts more context: 1M tokens versus 400K.
Side by side
| GPT-5.2 Codex | Nova Premier 1.0 | |
|---|---|---|
| Provider | OpenAI | Amazon |
| Noometry Index | 42.2 | 37.7 |
| Released | 2025-12-18 | 2025-04-30 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | 1M |
| Max output | 128K | 10K |
| Input $ / M tokens | $1.75 | $2.50 |
| Output $ / M tokens | $14 | $12.50 |
| Results tracked | 5 | 6 |
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Category by category
Coding Not comparable
GPT-5.2 Codex: 45.4 (#66), Nova Premier 1.0: —
| Benchmark | GPT-5.2 Codex | Nova Premier 1.0 |
|---|---|---|
| SWE-bench Verified (bash only) | 72.8% | — |
| LMArena WebDev | 1339 | — |
| SWE-bench Multilingual | 66.3% | — |
| ALE-Bench | 1,300 | — |
Agentic & Tool Use Not comparable
GPT-5.2 Codex: 40.7 (#20), Nova Premier 1.0: —
| Benchmark | GPT-5.2 Codex | Nova Premier 1.0 |
|---|---|---|
| Terminal-Bench | 66.5% | — |
Reasoning Not comparable
GPT-5.2 Codex: —, Nova Premier 1.0: 22.3 (#182)
| Benchmark | GPT-5.2 Codex | Nova Premier 1.0 |
|---|---|---|
| Kagi LLM Benchmark | — | 44.8% |
Math Not comparable
GPT-5.2 Codex: —, Nova Premier 1.0: 31.5 (#194)
| Benchmark | GPT-5.2 Codex | Nova Premier 1.0 |
|---|---|---|
| Omni-MATH | — | 35% |
Knowledge Not comparable
GPT-5.2 Codex: —, Nova Premier 1.0: 35.4 (#176)
| Benchmark | GPT-5.2 Codex | Nova Premier 1.0 |
|---|---|---|
| MMLU-Pro | — | 72.6% |
| GPQA (HELM) | — | 51.8% |
Instruction Following Not comparable
GPT-5.2 Codex: —, Nova Premier 1.0: 66.9 (#201)
| Benchmark | GPT-5.2 Codex | Nova Premier 1.0 |
|---|---|---|
| IFEval | — | 80.3% |
Writing & Preference Not comparable
GPT-5.2 Codex: —, Nova Premier 1.0: 51.0 (#174)
| Benchmark | GPT-5.2 Codex | Nova Premier 1.0 |
|---|---|---|
| WildBench | — | 78.8% |
Frequently asked questions
Is GPT-5.2 Codex better than Nova Premier 1.0?
GPT-5.2 Codex is the stronger model overall, scoring 42.2 to 37.7 on the Noometry Index.
Which is cheaper, GPT-5.2 Codex or Nova Premier 1.0?
GPT-5.2 Codex is cheaper. It lists at $1.75 per million input tokens and $14 per million output tokens; Nova Premier 1.0 lists at $2.50 and $12.50.
Which has the bigger context window?
Nova Premier 1.0 does, with 1M tokens against 400K.
How many benchmarks do GPT-5.2 Codex and Nova Premier 1.0 share?
0 benchmarks have published results for both models. GPT-5.2 Codex has 5 scored results on Noometry and Nova Premier 1.0 has 6.