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Claude Fable 5 vs DeepSeek V4 Flash 0423

Claude Fable 5 leads DeepSeek V4 Flash 0423 on the Artificial Analysis Intelligence Index, 49.6 to 24.4, and DeepSeek V4 Flash 0423 costs 178.6x less per output token ($0.28 vs $50.00 per million). Updated October 22, 2026; 49 benchmarks have a result for both.

Replace Claude Fable 5 Replace DeepSeek V4 Flash 0423
Claude Fable 5Anthropic
Coding
79.3
Overall
79.0
Output $/M
$50.00
49
DeepSeek V4 Flash 0423DeepSeek
Coding
No data
Overall
No data
Output $/M
$0.28
0
vs boards won of 49 shared

Claude Fable 5 or DeepSeek V4 Flash 0423: which to pick

Only Claude Fable 5 has a coding score, 79.3 on the Vibe Coding Index; DeepSeek V4 Flash 0423 has none, so the two cannot be ranked on coding.

Pick DeepSeek V4 Flash 0423 for output tokens 178.6x cheaper ($0.28 vs $50.00 per million) and a larger context window (1.05M against 1M tokens).

Model AClaude Fable 5Anthropic79.3/1006 independent benchmarks$2.16 per solved taskModel BDeepSeek V4 Flash 0423DeepSeekNot benchmarked1 independent benchmarkNo cost per solved task
Shared results
49
Claude Fable 5 only
78
DeepSeek V4 Flash 0423 only
0
Like-for-like categories
8 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

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 79.3 from 6 benchmarks, DeepSeek V4 Flash 0423 not benchmarked.
Widest category
Agentic work, 24.4 points apart on average over 1 shared benchmark.
Widest single gap
WeirdML: Claude Fable 5 91.9% against DeepSeek V4 Flash 0423 45.6%, 46.3 points apart on a 0 to 100 scale.
Output price
Claude Fable 5 $50.00 against DeepSeek V4 Flash 0423 $0.28 per million output tokens, 178.6x apart.
Context window
Claude Fable 5 takes 1M tokens, DeepSeek V4 Flash 0423 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 5BarsDeepSeek V4 Flash 0423Ties
Coding80
Intelligence20
Agentic work10
Reasoning50
Math20
Knowledge40
Web design80
General190
All shared boards490
CodingLike-for-likeSix of these boards feed the Vibe Coding Index80
Coding benchmarks for Claude Fable 5 and DeepSeek V4 Flash 0423
BenchmarkClaude Fable 5DeepSeek V4 Flash 0423Leader
LiveBench coding98.3%Not measuredOnly Claude Fable 5 measured
LMArena WebDev16241582Claude Fable 5
AA Coding Index76.552.0Claude Fable 5
LiveCodeBench (Vals AI)89.8%Not measuredOnly Claude Fable 5 measured
SWE-bench Verified (Vals AI)95.0%Not measuredOnly Claude Fable 5 measured
Terminal-Bench 4 (Vals AI)41.4%Not measuredOnly Claude Fable 5 measured
Vibe Code Bench (Vals AI)90.3%Not measuredOnly Claude Fable 5 measured
Code migration (Vals AI)55.1%Not measuredOnly Claude Fable 5 measured
ProgramBench (Vals AI)2.0%Not measuredOnly Claude Fable 5 measured
Terminal-Bench 2.1 (Vals AI)80.5%Not measuredOnly Claude Fable 5 measured
SciCode61.0%Not measuredOnly Claude Fable 5 measured
Terminal-Bench Hard (Artificial Analysis run)62.9%Not measuredOnly Claude Fable 5 measured
FrontierCode53.5%Not measuredOnly Claude Fable 5 measured
FrontierSWE47.0%Not measuredOnly Claude Fable 5 measured
GSO-Bench78.4%Not measuredOnly Claude Fable 5 measured
WeirdML91.9%45.6%Claude Fable 5
MirrorCode63.9%Not measuredOnly Claude Fable 5 measured
ALE-Bench2041.3678.2Claude Fable 5
LMArena Text: coding15181457Claude Fable 5
LMArena Text: software and IT15131453Claude Fable 5
LMArena WebDev: React16311585Claude Fable 5
LMArena WebDev: HTML16511558Claude Fable 5
LMArena WebDev: from an image1623Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 16 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Fable 5 and DeepSeek V4 Flash 0423
BenchmarkClaude Fable 5DeepSeek V4 Flash 0423Leader
AA Intelligence Index49.624.4Claude Fable 5
Epoch Capabilities Index163.4146.1Claude Fable 5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for Claude Fable 5 and DeepSeek V4 Flash 0423
BenchmarkClaude Fable 5DeepSeek V4 Flash 0423Leader
AA Agentic Index50.726.3Claude Fable 5
Design Arena: agents building web apps1261Not measuredOnly Claude Fable 5 measured
Design Arena: agents building full-stack apps1280Not measuredOnly Claude Fable 5 measured
Design Arena: agents building mobile apps1264Not measuredOnly Claude Fable 5 measured
Design Arena: agents building Android apps1284Not measuredOnly Claude Fable 5 measured
Design Arena: agents building Godot games1292Not measuredOnly Claude Fable 5 measured
Design Arena: agents building games1285Not measuredOnly Claude Fable 5 measured
Design Arena: HTML slides1227Not measuredOnly Claude Fable 5 measured
Design Arena: PowerPoint slides1270Not measuredOnly Claude Fable 5 measured
LiveBench research86.9%Not measuredOnly Claude Fable 5 measured
LiveBench browser92.0%Not measuredOnly Claude Fable 5 measured
LiveBench long agentic53.2%Not measuredOnly Claude Fable 5 measured
Finance Agent (Vals AI)56.3%Not measuredOnly Claude Fable 5 measured
Tax Agent Bench (Vals AI)38.3%Not measuredOnly Claude Fable 5 measured
Legal Research Bench (Vals AI)49.5%Not measuredOnly Claude Fable 5 measured
Excel Modeling Benchmark (Vals AI)73.7%Not measuredOnly Claude Fable 5 measured
Terminal-Bench-Science (Vals AI)15.7%Not measuredOnly Claude Fable 5 measured
τ²-Bench Telecom98.5%Not measuredOnly Claude Fable 5 measured
APEX-Agents63.6%Not measuredOnly Claude Fable 5 measured
Remote Labor Index16.1%Not measuredOnly Claude Fable 5 measured
PostTrainBench41.8%Not measuredOnly Claude Fable 5 measured
Vending-Bench 2$5,680Not measuredOnly Claude Fable 5 measured
LMArena Search1229Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 18 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for Claude Fable 5 and DeepSeek V4 Flash 0423
BenchmarkClaude Fable 5DeepSeek V4 Flash 0423Leader
GPQA Diamond93.2%Not measuredOnly Claude Fable 5 measured
LiveBench reasoning89.7%Not measuredOnly Claude Fable 5 measured
MMMU Pro (Vals AI)89.3%Not measuredOnly Claude Fable 5 measured
GPQA Diamond (Artificial Analysis run)92.6%Not measuredOnly Claude Fable 5 measured
Humanity's Last Exam (Artificial Analysis run)55.5%Not measuredOnly Claude Fable 5 measured
GPQA Diamond (Epoch AI run)85.9%Not measuredOnly Claude Fable 5 measured
ARC-AGI98.5%Not measuredOnly Claude Fable 5 measured
ARC-AGI-289.2%Not measuredOnly Claude Fable 5 measured
SimpleBench81.9%46.3%Claude Fable 5
Chess puzzles47.0%Not measuredOnly Claude Fable 5 measured
Mystery game puzzles52.0%Not measuredOnly Claude Fable 5 measured
EBR-bench39.5%Not measuredOnly Claude Fable 5 measured
LMArena Text: hard prompts15071444Claude Fable 5
LMArena Text: expert15341441Claude Fable 5
LMArena Text: hard prompts in English15091449Claude Fable 5
LMArena Vision: diagrams1357Not measuredOnly Claude Fable 5 measured
LMArena Vision: homework1361Not measuredOnly Claude Fable 5 measured
Kagi LLM Benchmark91.4%52.2%Claude Fable 5
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index20
Math benchmarks for Claude Fable 5 and DeepSeek V4 Flash 0423
BenchmarkClaude Fable 5DeepSeek V4 Flash 0423Leader
OTIS Mock AIME100.0%Not measuredOnly Claude Fable 5 measured
FrontierMath, tiers 1 to 387.0%Not measuredOnly Claude Fable 5 measured
FrontierMath, tier 490.2%Not measuredOnly Claude Fable 5 measured
ProofBench95.0%Not measuredOnly Claude Fable 5 measured
LMArena Text: math15161426Claude Fable 5
LMArena Text: mathematical work15151432Claude Fable 5
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for Claude Fable 5 and DeepSeek V4 Flash 0423
BenchmarkClaude Fable 5DeepSeek V4 Flash 0423Leader
MMLU Pro91.5%Not measuredOnly Claude Fable 5 measured
LegalBench (Vals AI)88.6%Not measuredOnly Claude Fable 5 measured
CorpFin (Vals AI)71.8%Not measuredOnly Claude Fable 5 measured
TaxEval (Vals AI)76.9%Not measuredOnly Claude Fable 5 measured
MortgageTax (Vals AI)68.9%Not measuredOnly Claude Fable 5 measured
MedCode (Vals AI)56.1%Not measuredOnly Claude Fable 5 measured
SimpleQA Verified70.7%Not measuredOnly Claude Fable 5 measured
LMArena Text: science15061446Claude Fable 5
LMArena Text: medicine and healthcare14801448Claude Fable 5
LMArena Text: legal and government14981439Claude Fable 5
LMArena Text: business and finance14801425Claude Fable 5
Neither model has a result on the other 7 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index80
Web design benchmarks for Claude Fable 5 and DeepSeek V4 Flash 0423
BenchmarkClaude Fable 5DeepSeek V4 Flash 0423Leader
Design Arena: websites12951207Claude Fable 5
Design Arena: UI components13161162Claude Fable 5
Design Arena: game dev13351196Claude Fable 5
Design Arena: data viz13041127Claude Fable 5
Design Arena: 3D13181188Claude Fable 5
Design Arena: all code categories13101205Claude Fable 5
Design Arena: SVG13021155Claude Fable 5
Design Arena: ASCII art13291109Claude Fable 5
LiveBench design84.7%Not measuredOnly Claude Fable 5 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index190
General benchmarks for Claude Fable 5 and DeepSeek V4 Flash 0423
BenchmarkClaude Fable 5DeepSeek V4 Flash 0423Leader
LiveBench data analysis80.5%Not measuredOnly Claude Fable 5 measured
Public Benefits Bench (Vals AI)70.4%Not measuredOnly Claude Fable 5 measured
SAGE (Vals AI)51.9%Not measuredOnly Claude Fable 5 measured
MedScribe (Vals AI)88.5%Not measuredOnly Claude Fable 5 measured
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%Not measuredOnly Claude Fable 5 measured
DTBench98.4%86.4%Claude Fable 5
LMCA61.2%35.9%Claude Fable 5
Surface Evolver Bench95.0%Not measuredOnly Claude Fable 5 measured
Furniture assembly35.8%Not measuredOnly Claude Fable 5 measured
LMArena Text14911432Claude Fable 5
LMArena Text: instruction following15021421Claude Fable 5
LMArena Text: creative writing14941403Claude Fable 5
LMArena Vision1325Not measuredOnly Claude Fable 5 measured
LMArena Text: English14981441Claude Fable 5
LMArena Text: non-English14821419Claude Fable 5
LMArena Text: Chinese15431463Claude Fable 5
LMArena Text: German14861419Claude Fable 5
LMArena Text: Japanese15041389Claude Fable 5
LMArena Text: Korean14871383Claude Fable 5
LMArena Text: French15051439Claude Fable 5
LMArena Text: Spanish14981436Claude Fable 5
LMArena Text: Russian15031427Claude Fable 5
LMArena Text: Polish14941436Claude Fable 5
LMArena Text: multi-turn15041449Claude Fable 5
LMArena Text: longer queries15101434Claude Fable 5
LMArena Text: writing and language15011410Claude Fable 5
LMArena Text: entertainment and media14821400Claude Fable 5
LMArena Vision: English1323Not measuredOnly Claude Fable 5 measured
LMArena Vision: Chinese1373Not measuredOnly Claude Fable 5 measured
LMArena Vision: reading text1337Not measuredOnly Claude Fable 5 measured
LMArena Vision: humor1341Not measuredOnly Claude Fable 5 measured
LMArena Vision: creative writing1338Not measuredOnly Claude Fable 5 measured
LMArena Document1496Not measuredOnly Claude Fable 5 measured
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 DeepSeek V4 Flash 0423
BenchmarkClaude Fable 5DeepSeek V4 Flash 0423Leader
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
DeepSeek V4 Flash 0423$0.0003Fits in one request

DeepSeek V4 Flash 0423 costs less

Repository review

50K input + 3K output tokens

Claude Fable 5$0.650Fits in one request
DeepSeek V4 Flash 0423$0.0078Fits in one request

DeepSeek V4 Flash 0423 costs less

Agent loop

200K input + 10K output tokens

Claude Fable 5$2.50Fits in one request
DeepSeek V4 Flash 0423$0.031Fits in one request

DeepSeek V4 Flash 0423 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 DeepSeek V4 Flash 0423
SpecificationAnthropic Claude Fable 5DeepSeek V4 Flash 0423
MakerAnthropicDeepSeek
WeightsNo public weights listedOpen weights
ReleasedJune 9, 2026April 24, 2026
Context window1M1.05M
Input $/Mtok$10.00$0.14
Output $/Mtok$50.00$0.28
Coding index79.3Not benchmarked
Independent measurements behind it61
Cost per solved task$2.16Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Fable 5 better than DeepSeek V4 Flash 0423 for coding?

Only Claude Fable 5 has a coding score, 79.3 on the Vibe Coding Index; DeepSeek V4 Flash 0423 has none, so the two cannot be ranked on coding. Pick DeepSeek V4 Flash 0423 for output tokens 178.6x cheaper ($0.28 vs $50.00 per million) and a larger context window (1.05M against 1M tokens).

Which is cheaper, Claude Fable 5 or DeepSeek V4 Flash 0423?

Claude Fable 5 costs $10.00 per million input tokens and $50.00 per million output tokens; DeepSeek V4 Flash 0423 costs $0.14 and $0.28. Cost per solved task is known for Claude Fable 5 only.

Which has the bigger context window, Claude Fable 5 or DeepSeek V4 Flash 0423?

DeepSeek V4 Flash 0423, with 1.05M tokens against 1M.

How many benchmarks is the Claude Fable 5 vs DeepSeek V4 Flash 0423 comparison based on?

49 benchmarks have a result for both models as of October 22, 2026. Claude Fable 5's coding index rests on 6 independent benchmarks and DeepSeek V4 Flash 0423's on 1. Where only one model has a result, the page says so instead of naming a winner.

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