LLMBenchmark.ai

Enter opens the highlighted result. Esc closes.

Claude Fable 5 vs Grok 4.6

Updated October 21, 2026. 115 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Claude Fable 5 Replace Grok 4.6
Claude Fable 5Anthropic
Coding
82.1
Overall
49.6
Output $/M
$50.00
104
Grok 4.6xAI
Coding
76.4
Overall
44.3
Output $/M
$6.00
11
vs boards won of 115 shared

Decision reading

Pick Claude Fable 5 for coding: it scores 82.1 on the Vibe Coding Index against 76.4 for Grok 4.6.

Pick Grok 4.6 when output tokens cost 8.3x less, or when a solved task costs $0.82 against $2.16.

Model AClaude Fable 5Anthropic82.1/1002 independent benchmarks$2.16 per solved taskModel BGrok 4.6xAI76.4/1002 independent benchmarks$0.82 per solved task
Shared results
115
Claude Fable 5 only
11
Grok 4.6 only
8
Like-for-like categories
8 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
Claude Fable 5 82.1 from 2 benchmarks, Grok 4.6 76.4 from 2 benchmarks.
Widest category
Math, 24.9 points apart on average over 6 shared benchmarks.
Widest single gap
FrontierMath, tier 4: Claude Fable 5 90.2% against Grok 4.6 31.7%, 58.5 points apart on a 0 to 100 scale.
Output price
Claude Fable 5 $50.00 against Grok 4.6 $6.00 per million output tokens, 8.3x apart.
Context window
Claude Fable 5 takes 1M tokens, Grok 4.6 500K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
CategoryClaude Fable 5BarsGrok 4.6Ties
Coding182
Intelligence20
Agentic work154
Reasoning124
Math60
Knowledge110
Web design90
General311
All shared boards10411
CodingLike-for-likeFour of these boards feed the Vibe Coding Index182
Coding benchmarks for Claude Fable 5 and Grok 4.6
BenchmarkClaude Fable 5Grok 4.6Leader
LiveBench coding98.3%89.1%Claude Fable 5
LMArena WebDev16241617Claude Fable 5
AA Coding Index76.576.8Grok 4.6
LiveCodeBench (Vals AI)89.8%88.2%Claude Fable 5
SWE-bench Verified (Vals AI)95.0%95.6%Grok 4.6
Terminal-Bench 4 (Vals AI)41.4%17.2%Claude Fable 5
Vibe Code Bench (Vals AI)90.3%76.2%Claude Fable 5
Code migration (Vals AI)55.1%44.6%Claude Fable 5
ProgramBench (Vals AI)2.0%1.0%Claude Fable 5
IOI (Vals AI)Not measured47.6%Only Grok 4.6 measured
Terminal-Bench 2.1 (Vals AI)80.5%78.3%Claude Fable 5
Vibe Code Bench 1-100 (Vals AI)Not measured14.8%Only Grok 4.6 measured
SkillsBench (Vals AI)Not measured55.8%Only Grok 4.6 measured
CyberBench (Vals AI)Not measured67.7%Only Grok 4.6 measured
SciCode61.0%56.5%Claude Fable 5
Terminal-Bench Hard (Artificial Analysis run)62.9%Not measuredOnly Claude Fable 5 measured
FrontierCode53.5%48.0%Claude Fable 5
FrontierSWE47.0%25.3%Claude Fable 5
GSO-Bench78.4%Not measuredOnly Claude Fable 5 measured
WeirdML91.9%67.3%Claude Fable 5
MirrorCode63.9%Not measuredOnly Claude Fable 5 measured
ALE-Bench2041.31508.1Claude Fable 5
LMArena Text: coding15181466Claude Fable 5
LMArena Text: software and IT15131457Claude Fable 5
LMArena WebDev: React16311631Claude Fable 5
LMArena WebDev: HTML16511597Claude Fable 5
LMArena WebDev: from an image16231603Claude Fable 5
Neither model has a result on the other 11 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Fable 5 and Grok 4.6
BenchmarkClaude Fable 5Grok 4.6Leader
AA Intelligence Index49.644.3Claude Fable 5
Epoch Capabilities Index163.4156.6Claude Fable 5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index154
Agentic work benchmarks for Claude Fable 5 and Grok 4.6
BenchmarkClaude Fable 5Grok 4.6Leader
AA Agentic Index50.753.0Grok 4.6
Design Arena: agents building web apps12611247Claude Fable 5
Design Arena: agents building full-stack apps12801264Claude Fable 5
Design Arena: agents building mobile apps12641234Claude Fable 5
Design Arena: agents building Android apps12891297Grok 4.6
Design Arena: agents building Godot games12921276Claude Fable 5
Design Arena: agents building games12851208Claude Fable 5
Design Arena: HTML slides12771249Claude Fable 5
Design Arena: PowerPoint slides12951241Claude Fable 5
LiveBench research86.9%84.5%Claude Fable 5
LiveBench browser92.0%64.0%Claude Fable 5
LiveBench long agentic53.2%40.7%Claude Fable 5
Finance Agent (Vals AI)56.3%53.7%Claude Fable 5
Tax Agent Bench (Vals AI)38.3%33.1%Claude Fable 5
Legal Research Bench (Vals AI)49.5%48.1%Claude Fable 5
Excel Modeling Benchmark (Vals AI)73.7%62.7%Claude Fable 5
BioMysteryBench (Vals AI)Not measured72.2%Only Grok 4.6 measured
Terminal-Bench-Science (Vals AI)15.7%11.4%Claude Fable 5
Vals Science IndexNot measured38.1%Only Grok 4.6 measured
Time Horizon Index (Vals AI)Not measured5.8%Only Grok 4.6 measured
τ²-Bench Telecom98.5%Not measuredOnly Claude Fable 5 measured
APEX-Agents63.6%65.3%Grok 4.6
Remote Labor Index16.1%Not measuredOnly Claude Fable 5 measured
PostTrainBench41.8%Not measuredOnly Claude Fable 5 measured
Vending-Bench 2$5,680$9,047Grok 4.6
LMArena Search1229Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 13 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index124
Reasoning benchmarks for Claude Fable 5 and Grok 4.6
BenchmarkClaude Fable 5Grok 4.6Leader
GPQA Diamond93.2%94.7%Grok 4.6
LiveBench reasoning89.7%91.2%Grok 4.6
MysteryMechanism (Vals AI)Not measured30.6%Only Grok 4.6 measured
MMMU Pro (Vals AI)89.3%Not measuredOnly Claude Fable 5 measured
GPQA Diamond (Artificial Analysis run)92.6%94.9%Grok 4.6
Humanity's Last Exam (Artificial Analysis run)55.5%44.1%Claude Fable 5
GPQA Diamond (Epoch AI run)85.9%94.0%Grok 4.6
ARC-AGI98.5%87.5%Claude Fable 5
ARC-AGI-289.2%67.1%Claude Fable 5
SimpleBench81.9%75.9%Claude Fable 5
Chess puzzles47.0%33.0%Claude Fable 5
Mystery game puzzles52.0%34.0%Claude Fable 5
EBR-bench39.5%30.5%Claude Fable 5
LMArena Text: hard prompts15071448Claude Fable 5
LMArena Text: expert15341469Claude Fable 5
LMArena Text: hard prompts in English15091445Claude Fable 5
LMArena Vision: diagrams13571285Claude Fable 5
LMArena Vision: homework13611283Claude Fable 5
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index60
Math benchmarks for Claude Fable 5 and Grok 4.6
BenchmarkClaude Fable 5Grok 4.6Leader
OTIS Mock AIME100.0%99.2%Claude Fable 5
FrontierMath, tiers 1 to 387.0%66.0%Claude Fable 5
FrontierMath, tier 490.2%31.7%Claude Fable 5
ProofBench95.0%51.0%Claude Fable 5
LMArena Text: math15161417Claude Fable 5
LMArena Text: mathematical work15151464Claude Fable 5
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index110
Knowledge benchmarks for Claude Fable 5 and Grok 4.6
BenchmarkClaude Fable 5Grok 4.6Leader
MMLU Pro91.5%89.4%Claude Fable 5
LegalBench (Vals AI)88.6%86.3%Claude Fable 5
CorpFin (Vals AI)71.8%66.2%Claude Fable 5
TaxEval (Vals AI)76.9%71.1%Claude Fable 5
MortgageTax (Vals AI)68.9%64.2%Claude Fable 5
MedCode (Vals AI)56.1%44.7%Claude Fable 5
SimpleQA Verified70.7%49.3%Claude Fable 5
LMArena Text: science15061437Claude Fable 5
LMArena Text: medicine and healthcare14801420Claude Fable 5
LMArena Text: legal and government14981429Claude Fable 5
LMArena Text: business and finance14801416Claude Fable 5
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index90
Web design benchmarks for Claude Fable 5 and Grok 4.6
BenchmarkClaude Fable 5Grok 4.6Leader
Design Arena: websites12961289Claude Fable 5
Design Arena: UI components13181294Claude Fable 5
Design Arena: game dev13361296Claude Fable 5
Design Arena: data viz13041283Claude Fable 5
Design Arena: 3D13191277Claude Fable 5
Design Arena: all code categories13101292Claude Fable 5
Design Arena: SVG13021239Claude Fable 5
Design Arena: ASCII art13281278Claude Fable 5
LiveBench design84.7%79.8%Claude Fable 5
GeneralLike-for-likePublic boards, shown as published, kept out of the index311
General benchmarks for Claude Fable 5 and Grok 4.6
BenchmarkClaude Fable 5Grok 4.6Leader
LiveBench data analysis80.5%75.3%Claude Fable 5
Public Benefits Bench (Vals AI)70.4%66.8%Claude Fable 5
SAGE (Vals AI)51.9%28.9%Claude Fable 5
MedScribe (Vals AI)88.5%86.5%Claude Fable 5
Vals Multimodal Index74.2%Not measuredOnly Claude Fable 5 measured
IFBench63.5%Not measuredOnly Claude Fable 5 measured
Long context reasoning (AA-LCR)82.3%81.0%Claude Fable 5
DTBench98.4%97.3%Claude Fable 5
LMCA61.2%48.5%Claude Fable 5
Surface Evolver Bench95.0%Not measuredOnly Claude Fable 5 measured
Furniture assembly35.8%40.0%Grok 4.6
LMArena Text14911429Claude Fable 5
LMArena Text: instruction following15021431Claude Fable 5
LMArena Text: creative writing14941426Claude Fable 5
LMArena Vision13251263Claude Fable 5
LMArena Text: English14981433Claude Fable 5
LMArena Text: non-English14821420Claude Fable 5
LMArena Text: Chinese15431476Claude Fable 5
LMArena Text: German14861426Claude Fable 5
LMArena Text: Japanese15041378Claude Fable 5
LMArena Text: Korean14871391Claude Fable 5
LMArena Text: French15051455Claude Fable 5
LMArena Text: Spanish14981414Claude Fable 5
LMArena Text: Russian15031421Claude Fable 5
LMArena Text: Polish14941430Claude Fable 5
LMArena Text: multi-turn15041425Claude Fable 5
LMArena Text: longer queries15101456Claude Fable 5
LMArena Text: writing and language15011429Claude Fable 5
LMArena Text: entertainment and media14821421Claude Fable 5
LMArena Vision: English13231270Claude Fable 5
LMArena Vision: Chinese13731289Claude Fable 5
LMArena Vision: reading text13371272Claude Fable 5
LMArena Vision: humor13411270Claude Fable 5
LMArena Vision: creative writing13381262Claude Fable 5
LMArena Document14961452Claude Fable 5
Neither model has a result on the other 11 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Fable 5 and Grok 4.6
BenchmarkClaude Fable 5Grok 4.6Leader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Claude Fable 5$0.035Fits in one request
Grok 4.6$0.0050Fits in one request

Grok 4.6 costs less

Repository review

50K input + 3K output tokens

Claude Fable 5$0.650Fits in one request
Grok 4.6$0.118Fits in one request

Grok 4.6 costs less

Agent loop

200K input + 10K output tokens

Claude Fable 5$2.50Fits in one request
Grok 4.6$0.460Fits in one request

Grok 4.6 costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Claude Fable 5 and Grok 4.6
SpecificationAnthropic Claude Fable 5SpaceXAI Grok 4.6
MakerAnthropicxAI
WeightsNo public weights listedNo public weights listed
ReleasedJune 9, 2026August 12, 2026
Context window1M500K
Input $/Mtok$10.00$2.00
Output $/Mtok$50.00$6.00
Coding index82.176.4
Independent measurements behind it22
Cost per solved task$2.16$0.82
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Fable 5 better than Grok 4.6 for coding?

Pick Claude Fable 5 for coding: it scores 82.1 on the Vibe Coding Index against 76.4 for Grok 4.6. Pick Grok 4.6 when output tokens cost 8.3x less, or when a solved task costs $0.82 against $2.16.

Which is cheaper, Claude Fable 5 or Grok 4.6?

Claude Fable 5 costs $10.00 per million input tokens and $50.00 per million output tokens; Grok 4.6 costs $2.00 and $6.00. Per solved SWE-bench Verified task, Claude Fable 5 costs $2.16 and Grok 4.6 $0.82.

Which has the bigger context window, Claude Fable 5 or Grok 4.6?

Claude Fable 5, with 1M tokens against 500K.

How many benchmarks is the Claude Fable 5 vs Grok 4.6 comparison based on?

115 benchmarks have a result for both models as of October 21, 2026. Claude Fable 5's coding index rests on 2 independent benchmarks and Grok 4.6's on 2. Where only one model has a result, the page says so instead of naming a winner.

Compare next

Embed this comparison on your site

Free under CC BY 4.0, while the source link stays visible. Preview the frame · Terms and other embeds

<iframe src="https://llmbenchmark.ai/embed/compare/claude-fable-5-vs-grok-4-6" title="Claude Fable 5 vs Grok 4.6, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/claude-fable-5-vs-grok-4-6">LLMBenchmark.ai, Claude Fable 5 vs Grok 4.6</a></p>