Model comparison
GPT-5.3 Chat vs Nova Premier 1.0
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 38.3 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 51.0.
- Both cost about the same: $1.75 input and $14 output per million tokens.
- Nova Premier 1.0 accepts more context: 1M tokens versus 128K.
Side by side
| GPT-5.3 Chat | Nova Premier 1.0 | |
|---|---|---|
| Provider | OpenAI | Amazon |
| Noometry Index | 42.8 | 38.3 |
| Released | 2026-03-03 | 2025-04-30 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | 1M |
| Max output | 16K | 10K |
| Input $ / M tokens | $1.75 | $2.50 |
| Output $ / M tokens | $14 | $12.50 |
| Results tracked | 18 | 6 |
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Category by category
Coding Not comparable
GPT-5.3 Chat: 41.4 (#124), Nova Premier 1.0: —
| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| LMArena Coding | 1408 | — |
Reasoning GPT-5.3 Chat leads
GPT-5.3 Chat: 28.5 (#102), Nova Premier 1.0: 23.0 (#185)
| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| Kagi LLM Benchmark | — | 44.8% |
| LMArena Hard Prompts | 1399 | — |
Math GPT-5.3 Chat leads
GPT-5.3 Chat: 38.2 (#142), Nova Premier 1.0: 33.8 (#199)
| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| Omni-MATH | — | 35% |
| LMArena Math | 1389 | — |
Knowledge GPT-5.3 Chat leads
GPT-5.3 Chat: 38.8 (#140), Nova Premier 1.0: 35.8 (#180)
| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| MMLU-Pro | — | 72.6% |
| GPQA (HELM) | — | 51.8% |
| LMArena Expert | 1397 | — |
Multilingual Not comparable
GPT-5.3 Chat: 50.3 (#124), Nova Premier 1.0: —
| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| LMArena Non-English | 1382 | — |
| LMArena Chinese | 1432 | — |
| LMArena French | 1397 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
| LMArena Russian | 1400 | — |
| LMArena Spanish | 1371 | — |
Instruction Following GPT-5.3 Chat leads
GPT-5.3 Chat: 72.8 (#129), Nova Premier 1.0: 66.8 (#204)
| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| IFEval | — | 80.3% |
| LMArena Instruction Following | 1378 | — |
Long Context Not comparable
GPT-5.3 Chat: 42.6 (#120), Nova Premier 1.0: —
| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| LMArena Longer Query | 1396 | — |
Writing & Preference GPT-5.3 Chat leads
GPT-5.3 Chat: 63.1 (#68), Nova Premier 1.0: 51.0 (#178)
| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| LMArena Text | 1389 | — |
| LMArena Creative Writing | 1355 | — |
| EQ-Bench Creative Writing | 1690 | — |
| WildBench | — | 78.8% |
| LMArena Multi-Turn | 1412 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Nova Premier 1.0?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 38.3 on the Noometry Index.
Which is cheaper, GPT-5.3 Chat or Nova Premier 1.0?
GPT-5.3 Chat 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 128K.
How many benchmarks do GPT-5.3 Chat and Nova Premier 1.0 share?
0 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Nova Premier 1.0 has 6.