Noometry

Model comparison

Claude Sonnet 5 vs Grok Build 0.1

Claude Sonnet 5 is the stronger model overall, scoring 54.6 to 36.4 on the Noometry Index. Grok Build 0.1 costs 3.2× less per token, which makes it the better buy when Claude Sonnet 5's lead doesn't matter for your workload.

Last verified . 3 shared benchmarks.

Claude Sonnet 5 Anthropic

54.6

Rank #29 Confirmed

Grok Build 0.1 xAI

36.4

Rank #216 Reported

Summary

  • They share 3 benchmarks with published results for both. Claude Sonnet 5 scores higher in 3 categories and Grok Build 0.1 in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in agentic & tool use, where Claude Sonnet 5 leads 42.8 to 22.7.
  • The biggest single-benchmark swing is GBAEval: 65.3% for Claude Sonnet 5 and 2.4% for Grok Build 0.1.
  • Grok Build 0.1 is cheaper at $1 / $2 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.
  • Claude Sonnet 5 accepts more context: 1M tokens versus 256K.

Side by side

Claude Sonnet 5Grok Build 0.1
ProviderAnthropicxAI
Noometry Index54.636.4
Released2026-06-292026-04-16
WeightsProprietaryProprietary
Context window1M256K
Max output128K256K
Input $ / M tokens$2$1
Output $ / M tokens$10$2
Results tracked513

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Category by category

Coding Claude Sonnet 5 leads

Claude Sonnet 5: 55.5 (#26), Grok Build 0.1: 43.1 (#91)

BenchmarkClaude Sonnet 5Grok Build 0.1
SciCode54.3%50.2%
DeepSWE53.8%—
FrontierCode42.7%—
CursorBench34.1%—
LMArena WebDev1541—
GSO37.3%—
WeirdML68.8%—
LMArena Coding1483—
ALE-Bench1,463—

Agentic & Tool Use Claude Sonnet 5 leads

Claude Sonnet 5: 42.8 (#18), Grok Build 0.1: 22.7 (#129)

BenchmarkClaude Sonnet 5Grok Build 0.1
GBAEval65.3%2.4%
APEX-Agents54.5%—
LMArena Search1194—
Vending-Bench 26,378—

Reasoning Claude Sonnet 5 leads

Claude Sonnet 5: 49.1 (#39), Grok Build 0.1: 32.2 (#77)

BenchmarkClaude Sonnet 5Grok Build 0.1
CritPt16.9%9.1%
SimpleBench60.6%—
NYT Connections (extended)75.1%—
Chess Puzzles35%—
LMArena Hard Prompts1461—
Mystery Game Puzzles35%—
DTBench92.5%—
LMCA50%—
Surface Evolver Bench60%—
Bench to the Future 30.14—
Epoch Capabilities Index156.21—
ForecastBench61.1—

Math Not comparable

Claude Sonnet 5: 66.2 (#27), Grok Build 0.1: —

BenchmarkClaude Sonnet 5Grok Build 0.1
FrontierMath (Tiers 1-3)65.6%—
FrontierMath Tier 429.3%—
OTIS Mock AIME 2024-202594.7%—
ProofBench77%—
LMArena Math1467—

Knowledge Not comparable

Claude Sonnet 5: 55.6 (#47), Grok Build 0.1: —

BenchmarkClaude Sonnet 5Grok Build 0.1
GPQA Diamond90.5%—
SimpleQA Verified33.7%—
LMArena Expert1490—

Multimodal Not comparable

Claude Sonnet 5: 42.4 (#31), Grok Build 0.1: —

BenchmarkClaude Sonnet 5Grok Build 0.1
LMArena Vision1274—
Blueprint-Bench 224.9%—
LMArena Document1466—

Multilingual Not comparable

Claude Sonnet 5: 53.8 (#55), Grok Build 0.1: —

BenchmarkClaude Sonnet 5Grok Build 0.1
LMArena Non-English1431—
LMArena Chinese1477—
LMArena French1460—
LMArena German1440—
LMArena Japanese1422—
LMArena Korean1411—
LMArena Russian1451—
LMArena Spanish1437—

Instruction Following Not comparable

Claude Sonnet 5: 76.3 (#41), Grok Build 0.1: —

BenchmarkClaude Sonnet 5Grok Build 0.1
LMArena Instruction Following1452—

Long Context Not comparable

Claude Sonnet 5: 44.8 (#55), Grok Build 0.1: —

BenchmarkClaude Sonnet 5Grok Build 0.1
LMArena Longer Query1463—

Writing & Preference Not comparable

Claude Sonnet 5: 69.2 (#25), Grok Build 0.1: —

BenchmarkClaude Sonnet 5Grok Build 0.1
LMArena Text1442—
LMArena Creative Writing1416—
EQ-Bench Creative Writing1794—
EQ-Bench 41236—
LMArena Multi-Turn1454—

Frequently asked questions

Is Claude Sonnet 5 better than Grok Build 0.1?

Claude Sonnet 5 is the stronger model overall, scoring 54.6 to 36.4 on the Noometry Index. Grok Build 0.1 costs 3.2× less per token, which makes it the better buy when Claude Sonnet 5's lead doesn't matter for your workload.

Which is cheaper, Claude Sonnet 5 or Grok Build 0.1?

Grok Build 0.1 is cheaper. It lists at $1 per million input tokens and $2 per million output tokens; Claude Sonnet 5 lists at $2 and $10.

Is Claude Sonnet 5 or Grok Build 0.1 better for coding?

Claude Sonnet 5 scores higher on coding benchmarks: 55.5 versus 43.1 in the Noometry coding category.

Which has the bigger context window?

Claude Sonnet 5 does, with 1M tokens against 256K.

How many benchmarks do Claude Sonnet 5 and Grok Build 0.1 share?

3 benchmarks have published results for both models. Claude Sonnet 5 has 51 scored results on Noometry and Grok Build 0.1 has 3.

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