Noometry

Model comparison

GPT-5.3 Chat vs Grok 4.7

Grok 4.7 is the stronger model overall, scoring 53.1 to 42.8 on the Noometry Index.

Last verified . 15 shared benchmarks.

GPT-5.3 Chat OpenAI

42.8

Rank #109 Confirmed

Grok 4.7 xAI

53.1

Rank #37 Confirmed

Summary

  • They share 15 benchmarks with published results for both. GPT-5.3 Chat scores higher in 0 categories and Grok 4.7 in 8 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where Grok 4.7 leads 62.8 to 38.8.
  • Grok 4.7 is cheaper at $2 / $6 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
  • Grok 4.7 accepts more context: 500K tokens versus 128K.

Side by side

GPT-5.3 ChatGrok 4.7
ProviderOpenAIxAI
Noometry Index42.853.1
Released2026-03-032026-09-21
WeightsProprietaryProprietary
Context window128K500K
Max output16K500K
Input $ / M tokens$1.75$2
Output $ / M tokens$14$6
Results tracked1839

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Grok 4.7 leads

GPT-5.3 Chat: 41.4 (#124), Grok 4.7: 58.0 (#18)

BenchmarkGPT-5.3 ChatGrok 4.7
LMArena Coding14081427
FrontierCode—47.6%
CursorBench—46.3%
LMArena WebDev—1639
FrontierSWE—29.5%
SciCode—57.8%

Agentic & Tool Use Not comparable

GPT-5.3 Chat: —, Grok 4.7: 36.7 (#37)

BenchmarkGPT-5.3 ChatGrok 4.7
APEX-Agents—54.6%
GDP.pdf—22.8%
Vending-Bench 2—10,537

Reasoning Grok 4.7 leads

GPT-5.3 Chat: 28.5 (#102), Grok 4.7: 49.1 (#40)

BenchmarkGPT-5.3 ChatGrok 4.7
LMArena Hard Prompts13991413
NYT Connections (extended)—76.8%
CritPt—18%
Chess Puzzles—38%
Mystery Game Puzzles—29%
DTBench—96%
LMCA—49.4%
Epoch Capabilities Index—153.53

Math Grok 4.7 leads

GPT-5.3 Chat: 38.2 (#142), Grok 4.7: 57.8 (#39)

BenchmarkGPT-5.3 ChatGrok 4.7
LMArena Math13891407
FrontierMath (Tiers 1-3)—53%
FrontierMath Tier 4—17.1%
OTIS Mock AIME 2024-2025—98.1%
ProofBench—34%

Knowledge Grok 4.7 leads

GPT-5.3 Chat: 38.8 (#140), Grok 4.7: 62.8 (#22)

BenchmarkGPT-5.3 ChatGrok 4.7
LMArena Expert13971422
GPQA Diamond—92.7%
SimpleQA Verified—56%

Multimodal Not comparable

GPT-5.3 Chat: —, Grok 4.7: 35.5 (#87)

BenchmarkGPT-5.3 ChatGrok 4.7
LMArena Vision—1228
Blueprint-Bench 2—32.5%
Furniture Assembly—20.8%

Multilingual Too close to call

GPT-5.3 Chat: 50.3 (#124), Grok 4.7: 50.8 (#116)

BenchmarkGPT-5.3 ChatGrok 4.7
LMArena Non-English13821389
LMArena Chinese14321455
LMArena French13971455
LMArena Russian14001397
LMArena Spanish13711400
LMArena German1384—
LMArena Japanese1352—
LMArena Korean1346—

Instruction Following Grok 4.7 leads

GPT-5.3 Chat: 72.8 (#129), Grok 4.7: 74.1 (#105)

BenchmarkGPT-5.3 ChatGrok 4.7
LMArena Instruction Following13781404

Long Context Too close to call

GPT-5.3 Chat: 42.6 (#120), Grok 4.7: 43.1 (#104)

BenchmarkGPT-5.3 ChatGrok 4.7
LMArena Longer Query13961413

Writing & Preference Grok 4.7 leads

GPT-5.3 Chat: 63.1 (#68), Grok 4.7: 70.0 (#24)

BenchmarkGPT-5.3 ChatGrok 4.7
LMArena Text13891399
LMArena Creative Writing13551391
EQ-Bench Creative Writing16902007
LMArena Multi-Turn14121393

Frequently asked questions

Is GPT-5.3 Chat better than Grok 4.7?

Grok 4.7 is the stronger model overall, scoring 53.1 to 42.8 on the Noometry Index.

Which is cheaper, GPT-5.3 Chat 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 Chat lists at $1.75 and $14.

Is GPT-5.3 Chat or Grok 4.7 better for coding?

Grok 4.7 scores higher on coding benchmarks: 58.0 versus 41.4 in the Noometry coding category.

Which has the bigger context window?

Grok 4.7 does, with 500K tokens against 128K.

How many benchmarks do GPT-5.3 Chat and Grok 4.7 share?

15 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Grok 4.7 has 39.

Related comparisons

Go deeper