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Claude Fable 5.1 vs DeepSeek V4 Pro 0813

Updated October 21, 2026. 73 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Claude Fable 5.1 Replace DeepSeek V4 Pro 0813
Claude Fable 5.1Anthropic
Coding
89.1
Overall
53.4
Output $/M
$50.00
72
DeepSeek V4 Pro 0813DeepSeek
Coding
54.6
Overall
36.0
Output $/M
$1.98
1
vs boards won of 73 shared

Decision reading

Pick Claude Fable 5.1 for coding: it scores 89.1 on the Vibe Coding Index against 54.6 for DeepSeek V4 Pro 0813.

Pick DeepSeek V4 Pro 0813 when output tokens cost 25.3x less, or when the context window is larger, 1.05M against 1M tokens.

Model AClaude Fable 5.1Anthropic89.1/1002 independent benchmarksNo cost per solved taskModel BDeepSeek V4 Pro 0813DeepSeek54.6/1001 independent benchmark$0.10 per solved task
Shared results
73
Claude Fable 5.1 only
51
DeepSeek V4 Pro 0813 only
5
Like-for-like categories
7 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 5.1 89.1 from 2 benchmarks, DeepSeek V4 Pro 0813 54.6 from 1 benchmark.
Widest category
Math, 28.2 points apart on average over 6 shared benchmarks.
Widest single gap
FrontierMath, tier 4: Claude Fable 5.1 87.8% against DeepSeek V4 Pro 0813 26.8%, 61.0 points apart on a 0 to 100 scale.
Output price
Claude Fable 5.1 $50.00 against DeepSeek V4 Pro 0813 $1.98 per million output tokens, 25.3x apart.
Context window
Claude Fable 5.1 takes 1M tokens, DeepSeek V4 Pro 0813 1.05M.

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 5.1BarsDeepSeek V4 Pro 0813Ties
Coding191
Intelligence20
Agentic work80
Reasoning100
Math60
Knowledge90
General180
All shared boards721
CodingLike-for-likeFour of these boards feed the Vibe Coding Index191
Coding benchmarks for Claude Fable 5.1 and DeepSeek V4 Pro 0813
BenchmarkClaude Fable 5.1DeepSeek V4 Pro 0813Leader
LiveBench coding97.7%Not measuredOnly Claude Fable 5.1 measured
LMArena WebDev17431582Claude Fable 5.1
AA Coding Index81.668.8Claude Fable 5.1
LiveCodeBench (Vals AI)90.5%87.5%Claude Fable 5.1
SWE-bench Verified (Vals AI)Not measured96.4%Only DeepSeek V4 Pro 0813 measured
Terminal-Bench 4 (Vals AI)58.1%14.1%Claude Fable 5.1
Vibe Code Bench (Vals AI)90.3%82.3%Claude Fable 5.1
Code migration (Vals AI)54.6%41.5%Claude Fable 5.1
ProgramBench (Vals AI)7.0%0.0%Claude Fable 5.1
IOI (Vals AI)90.8%51.6%Claude Fable 5.1
Terminal-Bench 2.1 (Vals AI)85.0%54.7%Claude Fable 5.1
SWE-bench Multimodal (Vals AI)61.3%Not measuredOnly Claude Fable 5.1 measured
Vibe Code Bench 1-100 (Vals AI)28.0%17.5%Claude Fable 5.1
SkillsBench (Vals AI)61.5%53.8%Claude Fable 5.1
CyberBench (Vals AI)70.4%72.9%DeepSeek V4 Pro 0813
SciCode63.1%51.0%Claude Fable 5.1
FrontierCode50.9%28.5%Claude Fable 5.1
FrontierSWE56.3%Not measuredOnly Claude Fable 5.1 measured
GSO-Bench88.2%Not measuredOnly Claude Fable 5.1 measured
WeirdML92.9%66.2%Claude Fable 5.1
MirrorCode73.3%Not measuredOnly Claude Fable 5.1 measured
ALE-Bench2143.21403.2Claude Fable 5.1
LMArena Text: coding15321469Claude Fable 5.1
LMArena Text: software and IT15301462Claude Fable 5.1
LMArena WebDev: React17921588Claude Fable 5.1
LMArena WebDev: HTML16841566Claude Fable 5.1
LMArena WebDev: from an image1722Not measuredOnly Claude Fable 5.1 measured
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 5.1 and DeepSeek V4 Pro 0813
BenchmarkClaude Fable 5.1DeepSeek V4 Pro 0813Leader
AA Intelligence Index53.436.0Claude Fable 5.1
Epoch Capabilities Index166.5155.6Claude Fable 5.1
Agentic workLike-for-likePublic boards, shown as published, kept out of the index80
Agentic work benchmarks for Claude Fable 5.1 and DeepSeek V4 Pro 0813
BenchmarkClaude Fable 5.1DeepSeek V4 Pro 0813Leader
AA Agentic Index57.941.3Claude Fable 5.1
Design Arena: agents building web apps1318Not measuredOnly Claude Fable 5.1 measured
Design Arena: agents building full-stack apps1326Not measuredOnly Claude Fable 5.1 measured
Design Arena: agents building mobile apps1267Not measuredOnly Claude Fable 5.1 measured
Design Arena: agents building Godot games1327Not measuredOnly Claude Fable 5.1 measured
Design Arena: PowerPoint slides1328Not measuredOnly Claude Fable 5.1 measured
Design Arena: spreadsheets1374Not measuredOnly Claude Fable 5.1 measured
LiveBench research82.0%Not measuredOnly Claude Fable 5.1 measured
LiveBench browser100.0%Not measuredOnly Claude Fable 5.1 measured
LiveBench long agentic80.8%Not measuredOnly Claude Fable 5.1 measured
SREBench (Vals AI)22.9%1.9%Claude Fable 5.1
Finance Agent (Vals AI)58.9%50.4%Claude Fable 5.1
Tax Agent Bench (Vals AI)49.2%26.8%Claude Fable 5.1
Legal Research Bench (Vals AI)55.3%40.9%Claude Fable 5.1
Harvey's Legal Agent Benchmark (Vals AI)Not measured10.8%Only DeepSeek V4 Pro 0813 measured
Excel Modeling Benchmark (Vals AI)76.7%52.8%Claude Fable 5.1
Terminal-Bench-Science (Vals AI)40.0%4.3%Claude Fable 5.1
Time Horizon Index (Vals AI)63.3%Not measuredOnly Claude Fable 5.1 measured
CUA-bench (Vals AI)13.2%Not measuredOnly Claude Fable 5.1 measured
Robo-bench (Vals AI)5.8%Not measuredOnly Claude Fable 5.1 measured
APEX-Agents68.6%47.3%Claude Fable 5.1
Remote Labor Index17.9%Not measuredOnly Claude Fable 5.1 measured
SpireClimb2.0%Not measuredOnly Claude Fable 5.1 measured
Vending-Bench 2$5,422Not measuredOnly Claude Fable 5.1 measured
LMArena Search1246Not measuredOnly Claude Fable 5.1 measured
Neither model has a result on the other 14 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index100
Reasoning benchmarks for Claude Fable 5.1 and DeepSeek V4 Pro 0813
BenchmarkClaude Fable 5.1DeepSeek V4 Pro 0813Leader
GPQA Diamond93.4%92.4%Claude Fable 5.1
LiveBench reasoning91.7%Not measuredOnly Claude Fable 5.1 measured
MysteryMechanism (Vals AI)47.8%Not measuredOnly Claude Fable 5.1 measured
MMMU Pro (Vals AI)90.6%Not measuredOnly Claude Fable 5.1 measured
GPQA Diamond (Artificial Analysis run)93.7%92.8%Claude Fable 5.1
Humanity's Last Exam (Artificial Analysis run)59.1%41.0%Claude Fable 5.1
GPQA Diamond (Epoch AI run)Not measured91.7%Only DeepSeek V4 Pro 0813 measured
ARC-AGI97.5%90.5%Claude Fable 5.1
ARC-AGI-290.0%61.3%Claude Fable 5.1
Chess puzzles48.0%46.0%Claude Fable 5.1
Mystery game puzzles58.0%43.0%Claude Fable 5.1
EBR-bench57.1%Not measuredOnly Claude Fable 5.1 measured
LMArena Text: hard prompts15281458Claude Fable 5.1
LMArena Text: expert15441459Claude Fable 5.1
LMArena Text: hard prompts in English15221463Claude Fable 5.1
LMArena Vision: diagrams1343Not measuredOnly Claude Fable 5.1 measured
LMArena Vision: homework1345Not measuredOnly Claude Fable 5.1 measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index60
Math benchmarks for Claude Fable 5.1 and DeepSeek V4 Pro 0813
BenchmarkClaude Fable 5.1DeepSeek V4 Pro 0813Leader
OTIS Mock AIME100.0%98.6%Claude Fable 5.1
FrontierMath, tiers 1 to 390.2%64.6%Claude Fable 5.1
FrontierMath, tier 487.8%26.8%Claude Fable 5.1
ProofBench100.0%50.0%Claude Fable 5.1
LMArena Text: math15311441Claude Fable 5.1
LMArena Text: mathematical work15411443Claude Fable 5.1
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index90
Knowledge benchmarks for Claude Fable 5.1 and DeepSeek V4 Pro 0813
BenchmarkClaude Fable 5.1DeepSeek V4 Pro 0813Leader
MMLU Pro92.4%87.0%Claude Fable 5.1
LegalBench (Vals AI)88.5%82.4%Claude Fable 5.1
CorpFin (Vals AI)Not measured65.4%Only DeepSeek V4 Pro 0813 measured
TaxEval (Vals AI)76.0%73.1%Claude Fable 5.1
MortgageTax (Vals AI)70.8%Not measuredOnly Claude Fable 5.1 measured
MedCode (Vals AI)53.5%42.5%Claude Fable 5.1
SimpleQA Verified70.8%52.9%Claude Fable 5.1
LMArena Text: science15321457Claude Fable 5.1
LMArena Text: medicine and healthcare15311446Claude Fable 5.1
LMArena Text: legal and government15141459Claude Fable 5.1
LMArena Text: business and finance14931442Claude Fable 5.1
Neither model has a result on the other 6 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Web design benchmarks for Claude Fable 5.1 and DeepSeek V4 Pro 0813
BenchmarkClaude Fable 5.1DeepSeek V4 Pro 0813Leader
Design Arena: websites1313Not measuredOnly Claude Fable 5.1 measured
Design Arena: UI components1338Not measuredOnly Claude Fable 5.1 measured
Design Arena: game dev1382Not measuredOnly Claude Fable 5.1 measured
Design Arena: data viz1344Not measuredOnly Claude Fable 5.1 measured
Design Arena: 3D1393Not measuredOnly Claude Fable 5.1 measured
Design Arena: all code categories1336Not measuredOnly Claude Fable 5.1 measured
Design Arena: SVG1301Not measuredOnly Claude Fable 5.1 measured
Design Arena: ASCII art1324Not measuredOnly Claude Fable 5.1 measured
LiveBench design83.4%Not measuredOnly Claude Fable 5.1 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index180
General benchmarks for Claude Fable 5.1 and DeepSeek V4 Pro 0813
BenchmarkClaude Fable 5.1DeepSeek V4 Pro 0813Leader
Vals IndexNot measured53.0%Only DeepSeek V4 Pro 0813 measured
LiveBench data analysis80.3%Not measuredOnly Claude Fable 5.1 measured
Public Benefits Bench (Vals AI)74.9%Not measuredOnly Claude Fable 5.1 measured
SAGE (Vals AI)48.5%Not measuredOnly Claude Fable 5.1 measured
MedScribe (Vals AI)91.3%80.2%Claude Fable 5.1
Long context reasoning (AA-LCR)85.3%80.3%Claude Fable 5.1
DTBench97.6%93.9%Claude Fable 5.1
LMCA65.5%45.5%Claude Fable 5.1
Furniture assembly70.0%Not measuredOnly Claude Fable 5.1 measured
LMArena Text15121446Claude Fable 5.1
LMArena Text: instruction following15181448Claude Fable 5.1
LMArena Text: creative writing15091439Claude Fable 5.1
LMArena Vision1319Not measuredOnly Claude Fable 5.1 measured
LMArena Text: English15061457Claude Fable 5.1
LMArena Text: non-English15081431Claude Fable 5.1
LMArena Text: Chinese15841481Claude Fable 5.1
LMArena Text: German1499Not measuredOnly Claude Fable 5.1 measured
LMArena Text: Japanese1562Not measuredOnly Claude Fable 5.1 measured
LMArena Text: Korean15171449Claude Fable 5.1
LMArena Text: French15231446Claude Fable 5.1
LMArena Text: Spanish15201435Claude Fable 5.1
LMArena Text: Russian15201448Claude Fable 5.1
LMArena Text: Polish1525Not measuredOnly Claude Fable 5.1 measured
LMArena Text: multi-turn14931454Claude Fable 5.1
LMArena Text: longer queries15241458Claude Fable 5.1
LMArena Text: writing and language15101443Claude Fable 5.1
LMArena Text: entertainment and media14971424Claude Fable 5.1
LMArena Vision: English1313Not measuredOnly Claude Fable 5.1 measured
LMArena Vision: Chinese1391Not measuredOnly Claude Fable 5.1 measured
LMArena Vision: reading text1327Not measuredOnly Claude Fable 5.1 measured
LMArena Vision: humor1318Not measuredOnly Claude Fable 5.1 measured
LMArena Vision: creative writing1330Not measuredOnly Claude Fable 5.1 measured
Neither model has a result on the other 14 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Fable 5.1 and DeepSeek V4 Pro 0813
BenchmarkClaude Fable 5.1DeepSeek V4 Pro 0813Leader
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 5.1$0.035Fits in one request
DeepSeek V4 Pro 0813$0.0016Fits in one request

DeepSeek V4 Pro 0813 costs less

Repository review

50K input + 3K output tokens

Claude Fable 5.1$0.650Fits in one request
DeepSeek V4 Pro 0813$0.039Fits in one request

DeepSeek V4 Pro 0813 costs less

Agent loop

200K input + 10K output tokens

Claude Fable 5.1$2.50Fits in one request
DeepSeek V4 Pro 0813$0.152Fits in one request

DeepSeek V4 Pro 0813 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 5.1 and DeepSeek V4 Pro 0813
SpecificationAnthropic Claude Fable 5.1DeepSeek V4 Pro 0813
MakerAnthropicDeepSeek
WeightsNo public weights listedOpen weights
ReleasedSeptember 1, 2026August 12, 2026
Context window1M1.05M
Input $/Mtok$10.00$0.66
Output $/Mtok$50.00$1.98
Coding index89.154.6
Independent measurements behind it21
Cost per solved taskNot computable$0.10
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Fable 5.1 better than DeepSeek V4 Pro 0813 for coding?

Pick Claude Fable 5.1 for coding: it scores 89.1 on the Vibe Coding Index against 54.6 for DeepSeek V4 Pro 0813. Pick DeepSeek V4 Pro 0813 when output tokens cost 25.3x less, or when the context window is larger, 1.05M against 1M tokens.

Which is cheaper, Claude Fable 5.1 or DeepSeek V4 Pro 0813?

Claude Fable 5.1 costs $10.00 per million input tokens and $50.00 per million output tokens; DeepSeek V4 Pro 0813 costs $0.66 and $1.98. Cost per solved task is known for DeepSeek V4 Pro 0813 only.

Which has the bigger context window, Claude Fable 5.1 or DeepSeek V4 Pro 0813?

DeepSeek V4 Pro 0813, with 1.05M tokens against 1M.

How many benchmarks is the Claude Fable 5.1 vs DeepSeek V4 Pro 0813 comparison based on?

73 benchmarks have a result for both models as of October 21, 2026. Claude Fable 5.1's coding index rests on 2 independent benchmarks and DeepSeek V4 Pro 0813's on 1. Where only one model has a result, the page says so instead of naming a winner.

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