Model comparison
GPT-5.3 Codex vs Grok 4.7
Grok 4.7 is the stronger model overall, scoring 53.1 to 45.8 on the Noometry Index.
Last verified . 3 shared benchmarks.
Summary
- They share 3 benchmarks with published results for both. GPT-5.3 Codex scores higher in 1 category and Grok 4.7 in 1 category; 2 gaps are clear of the uncertainty.
- The widest gap is in agentic & tool use, where GPT-5.3 Codex leads 48.0 to 36.7.
- Grok 4.7 is cheaper at $2 / $6 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Codex.
- Grok 4.7 accepts more context: 500K tokens versus 400K.
Side by side
| GPT-5.3 Codex | Grok 4.7 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 45.8 | 53.1 |
| Released | 2026-02-05 | 2026-09-21 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | 500K |
| Max output | 128K | 500K |
| Input $ / M tokens | $1.75 | $2 |
| Output $ / M tokens | $14 | $6 |
| Results tracked | 8 | 39 |
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Category by category
Coding Grok 4.7 leads
GPT-5.3 Codex: 48.6 (#56), Grok 4.7: 58.0 (#18)
| Benchmark | GPT-5.3 Codex | Grok 4.7 |
|---|---|---|
| LMArena WebDev | 1409 | 1639 |
| SWE-bench Verified | 74.8% | — |
| FrontierCode | — | 47.6% |
| CursorBench | — | 46.3% |
| FrontierSWE | — | 29.5% |
| SciCode | — | 57.8% |
| WeirdML | 79.3% | — |
| LMArena Coding | — | 1427 |
| ALE-Bench | 1,655 | — |
Agentic & Tool Use GPT-5.3 Codex leads
GPT-5.3 Codex: 48.0 (#9), Grok 4.7: 36.7 (#37)
| Benchmark | GPT-5.3 Codex | Grok 4.7 |
|---|---|---|
| Vending-Bench 2 | 5,940 | 10,537 |
| Terminal-Bench | 78.4% | — |
| APEX-Agents | — | 54.6% |
| GDP.pdf | — | 22.8% |
| METR Time Horizons | 74.5% | — |
Reasoning Not comparable
GPT-5.3 Codex: —, Grok 4.7: 49.1 (#40)
| Benchmark | GPT-5.3 Codex | Grok 4.7 |
|---|---|---|
| Epoch Capabilities Index | 156.77 | 153.53 |
| NYT Connections (extended) | — | 76.8% |
| CritPt | — | 18% |
| Chess Puzzles | — | 38% |
| LMArena Hard Prompts | — | 1413 |
| Mystery Game Puzzles | — | 29% |
| DTBench | — | 96% |
| LMCA | — | 49.4% |
Math Not comparable
GPT-5.3 Codex: —, Grok 4.7: 57.8 (#39)
| Benchmark | GPT-5.3 Codex | Grok 4.7 |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 53% |
| FrontierMath Tier 4 | — | 17.1% |
| OTIS Mock AIME 2024-2025 | — | 98.1% |
| ProofBench | — | 34% |
| LMArena Math | — | 1407 |
Knowledge Not comparable
GPT-5.3 Codex: —, Grok 4.7: 62.8 (#22)
| Benchmark | GPT-5.3 Codex | Grok 4.7 |
|---|---|---|
| GPQA Diamond | — | 92.7% |
| SimpleQA Verified | — | 56% |
| LMArena Expert | — | 1422 |
Multimodal Not comparable
GPT-5.3 Codex: —, Grok 4.7: 35.5 (#87)
| Benchmark | GPT-5.3 Codex | Grok 4.7 |
|---|---|---|
| LMArena Vision | — | 1228 |
| Blueprint-Bench 2 | — | 32.5% |
| Furniture Assembly | — | 20.8% |
Multilingual Not comparable
GPT-5.3 Codex: —, Grok 4.7: 50.8 (#116)
| Benchmark | GPT-5.3 Codex | Grok 4.7 |
|---|---|---|
| LMArena Non-English | — | 1389 |
| LMArena Chinese | — | 1455 |
| LMArena French | — | 1455 |
| LMArena Russian | — | 1397 |
| LMArena Spanish | — | 1400 |
Instruction Following Not comparable
GPT-5.3 Codex: —, Grok 4.7: 74.1 (#105)
| Benchmark | GPT-5.3 Codex | Grok 4.7 |
|---|---|---|
| LMArena Instruction Following | — | 1404 |
Long Context Not comparable
GPT-5.3 Codex: —, Grok 4.7: 43.1 (#104)
| Benchmark | GPT-5.3 Codex | Grok 4.7 |
|---|---|---|
| LMArena Longer Query | — | 1413 |
Writing & Preference Not comparable
GPT-5.3 Codex: —, Grok 4.7: 70.0 (#24)
| Benchmark | GPT-5.3 Codex | Grok 4.7 |
|---|---|---|
| LMArena Text | — | 1399 |
| LMArena Creative Writing | — | 1391 |
| EQ-Bench Creative Writing | — | 2007 |
| LMArena Multi-Turn | — | 1393 |
Frequently asked questions
Is GPT-5.3 Codex better than Grok 4.7?
Grok 4.7 is the stronger model overall, scoring 53.1 to 45.8 on the Noometry Index.
Which is cheaper, GPT-5.3 Codex or Grok 4.7?
Grok 4.7 is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; GPT-5.3 Codex lists at $1.75 and $14.
Is GPT-5.3 Codex or Grok 4.7 better for coding?
Grok 4.7 scores higher on coding benchmarks: 58.0 versus 48.6 in the Noometry coding category.
Which has the bigger context window?
Grok 4.7 does, with 500K tokens against 400K.
How many benchmarks do GPT-5.3 Codex and Grok 4.7 share?
3 benchmarks have published results for both models. GPT-5.3 Codex has 8 scored results on Noometry and Grok 4.7 has 39.