Model comparison
GPT-5.3 Chat vs GPT-5.4 Pro
GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 42.1 on the Noometry Index. GPT-5.3 Chat costs 14× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where GPT-5.4 Pro leads 71.0 to 27.3.
- GPT-5.3 Chat is cheaper at $1.75 / $14 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 128K.
Side by side
| GPT-5.3 Chat | GPT-5.4 Pro | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 42.1 | 58.8 |
| Released | 2026-03-03 | 2026-03-05 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | 1.05M |
| Max output | 16K | 128K |
| Input $ / M tokens | $1.75 | $30 |
| Output $ / M tokens | $14 | $180 |
| Results tracked | 18 | 16 |
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Category by category
Coding GPT-5.4 Pro leads
GPT-5.3 Chat: 40.8 (#124), GPT-5.4 Pro: 42.6 (#89)
| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| WeirdML | — | 57.4% |
| LMArena Coding | 1408 | — |
Reasoning GPT-5.4 Pro leads
GPT-5.3 Chat: 27.3 (#105), GPT-5.4 Pro: 71.0 (#10)
| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| ARC-AGI-2 | — | 83.3% |
| SimpleBench | — | 74.1% |
| ARC-AGI-1 | — | 94.5% |
| CritPt | — | 30% |
| Chess Puzzles | — | 58.6% |
| EnigmaEval | — | 23.8% |
| LMArena Hard Prompts | 1399 | — |
| Epoch Capabilities Index | — | 159.12 |
Math GPT-5.4 Pro leads
GPT-5.3 Chat: 35.4 (#146), GPT-5.4 Pro: 72.0 (#17)
| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 82.5% |
| FrontierMath Tier 4 | — | 58.5% |
| LMArena Math | 1389 | — |
| FrontierMath (Feb 2025 set) | — | 50% |
| FrontierMath Tier 4 (v1) | — | 37.5% |
Knowledge GPT-5.4 Pro leads
GPT-5.3 Chat: 38.2 (#137), GPT-5.4 Pro: 68.3 (#6)
| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| GPQA Diamond | — | 94.6% |
| Humanity's Last Exam | — | 44.3% |
| SimpleQA Verified | — | 46.3% |
| Vectara Hallucination Rate | — | 8.3% |
| LMArena Expert | 1397 | — |
Multilingual Not comparable
GPT-5.3 Chat: 50.5 (#119), GPT-5.4 Pro: —
| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| LMArena Non-English | 1383 | — |
| LMArena Chinese | 1433 | — |
| LMArena French | 1398 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1351 | — |
| LMArena Korean | 1347 | — |
| LMArena Russian | 1400 | — |
| LMArena Spanish | 1371 | — |
Instruction Following Not comparable
GPT-5.3 Chat: 73.0 (#124), GPT-5.4 Pro: —
| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| LMArena Instruction Following | 1378 | — |
Long Context Not comparable
GPT-5.3 Chat: 42.6 (#115), GPT-5.4 Pro: —
| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| LMArena Longer Query | 1396 | — |
Writing & Preference Not comparable
GPT-5.3 Chat: 63.3 (#65), GPT-5.4 Pro: —
| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| LMArena Text | 1389 | — |
| LMArena Creative Writing | 1356 | — |
| EQ-Bench Creative Writing | 1690 | — |
| LMArena Multi-Turn | 1413 | — |
Frequently asked questions
Is GPT-5.3 Chat better than GPT-5.4 Pro?
GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 42.1 on the Noometry Index. GPT-5.3 Chat costs 14× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.3 Chat or GPT-5.4 Pro?
GPT-5.3 Chat is cheaper. It lists at $1.75 per million input tokens and $14 per million output tokens; GPT-5.4 Pro lists at $30 and $180.
Is GPT-5.3 Chat or GPT-5.4 Pro better for coding?
GPT-5.4 Pro scores higher on coding benchmarks: 42.6 versus 40.8 in the Noometry coding category.
Which has the bigger context window?
GPT-5.4 Pro does, with 1.05M tokens against 128K.
How many benchmarks do GPT-5.3 Chat and GPT-5.4 Pro share?
0 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and GPT-5.4 Pro has 16.