Enter opens the highlighted result. Esc closes.

Claude Fable 5.1 vs Gemini 3.7 Flash

Updated October 21, 2026. 108 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 Gemini 3.7 Flash
Claude Fable 5.1Anthropic
Coding
89.1
Overall
53.4
Output $/M
$50.00
100
Gemini 3.7 FlashGoogle
Coding
69.9
Overall
39.6
Output $/M
$3.75
8
vs boards won of 108 shared

Decision reading

Pick Claude Fable 5.1 for coding: it scores 89.1 on the Vibe Coding Index against 69.9 for Gemini 3.7 Flash.

Pick Gemini 3.7 Flash when output tokens cost 13.3x 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 BGemini 3.7 FlashGoogle69.9/1002 independent benchmarks$1.78 per solved task
Shared results
108
Claude Fable 5.1 only
16
Gemini 3.7 Flash only
4
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 5.1 89.1 from 2 benchmarks, Gemini 3.7 Flash 69.9 from 2 benchmarks.
Widest category
Math, 20.7 points apart on average over 6 shared benchmarks.
Widest single gap
LiveBench long agentic: Claude Fable 5.1 80.8% against Gemini 3.7 Flash 28.3%, 52.5 points apart on a 0 to 100 scale.
Output price
Claude Fable 5.1 $50.00 against Gemini 3.7 Flash $3.75 per million output tokens, 13.3x apart.
Context window
Claude Fable 5.1 takes 1M tokens, Gemini 3.7 Flash 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 5.1BarsGemini 3.7 FlashTies
Coding201
Intelligence20
Agentic work151
Reasoning113
Math60
Knowledge100
Web design90
General273
All shared boards1008
CodingLike-for-likeFour of these boards feed the Vibe Coding Index201
Coding benchmarks for Claude Fable 5.1 and Gemini 3.7 Flash
BenchmarkClaude Fable 5.1Gemini 3.7 FlashLeader
LiveBench coding97.7%80.5%Claude Fable 5.1
LMArena WebDev17431591Claude Fable 5.1
AA Coding Index81.671.5Claude Fable 5.1
LiveCodeBench (Vals AI)90.5%88.7%Claude Fable 5.1
SWE-bench Verified (Vals AI)Not measured80.8%Only Gemini 3.7 Flash measured
Terminal-Bench 4 (Vals AI)58.1%12.1%Claude Fable 5.1
Vibe Code Bench (Vals AI)90.3%70.4%Claude Fable 5.1
Code migration (Vals AI)54.6%34.8%Claude Fable 5.1
ProgramBench (Vals AI)7.0%0.0%Claude Fable 5.1
IOI (Vals AI)90.8%67.8%Claude Fable 5.1
Terminal-Bench 2.1 (Vals AI)85.0%77.5%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%Not measuredOnly Claude Fable 5.1 measured
SkillsBench (Vals AI)61.5%65.9%Gemini 3.7 Flash
CyberBench (Vals AI)70.4%43.8%Claude Fable 5.1
SciCode63.1%59.8%Claude Fable 5.1
FrontierCode50.9%43.6%Claude Fable 5.1
FrontierSWE56.3%20.3%Claude Fable 5.1
GSO-Bench88.2%Not measuredOnly Claude Fable 5.1 measured
WeirdML92.9%Not measuredOnly Claude Fable 5.1 measured
MirrorCode73.3%Not measuredOnly Claude Fable 5.1 measured
ALE-Bench2143.2904.3Claude Fable 5.1
LMArena Text: coding15321499Claude Fable 5.1
LMArena Text: software and IT15301498Claude Fable 5.1
LMArena WebDev: React17921587Claude Fable 5.1
LMArena WebDev: HTML16841593Claude Fable 5.1
LMArena WebDev: from an image17221599Claude Fable 5.1
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 Gemini 3.7 Flash
BenchmarkClaude Fable 5.1Gemini 3.7 FlashLeader
AA Intelligence Index53.439.6Claude Fable 5.1
Epoch Capabilities Index166.5158.0Claude Fable 5.1
Agentic workLike-for-likePublic boards, shown as published, kept out of the index151
Agentic work benchmarks for Claude Fable 5.1 and Gemini 3.7 Flash
BenchmarkClaude Fable 5.1Gemini 3.7 FlashLeader
AA Agentic Index57.9Not measuredOnly Claude Fable 5.1 measured
Design Arena: agents building web apps13181224Claude Fable 5.1
Design Arena: agents building full-stack apps13261208Claude Fable 5.1
Design Arena: agents building mobile apps12671230Claude Fable 5.1
Design Arena: agents building Android appsNot measured1247Only Gemini 3.7 Flash measured
Design Arena: agents building Godot games13271264Claude Fable 5.1
Design Arena: agents building gamesNot measured1235Only Gemini 3.7 Flash measured
Design Arena: PowerPoint slides1328Not measuredOnly Claude Fable 5.1 measured
Design Arena: spreadsheets13741028Claude Fable 5.1
LiveBench research82.0%76.5%Claude Fable 5.1
LiveBench browser100.0%56.0%Claude Fable 5.1
LiveBench long agentic80.8%28.3%Claude Fable 5.1
SREBench (Vals AI)22.9%4.6%Claude Fable 5.1
Finance Agent (Vals AI)58.9%59.0%Gemini 3.7 Flash
Tax Agent Bench (Vals AI)49.2%22.8%Claude Fable 5.1
Legal Research Bench (Vals AI)55.3%34.6%Claude Fable 5.1
Excel Modeling Benchmark (Vals AI)76.7%71.3%Claude Fable 5.1
Terminal-Bench-Science (Vals AI)40.0%7.1%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%67.8%Claude Fable 5.1
Remote Labor Index17.9%5.0%Claude Fable 5.1
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 13 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index113
Reasoning benchmarks for Claude Fable 5.1 and Gemini 3.7 Flash
BenchmarkClaude Fable 5.1Gemini 3.7 FlashLeader
GPQA Diamond93.4%93.9%Gemini 3.7 Flash
LiveBench reasoning91.7%87.8%Claude Fable 5.1
MysteryMechanism (Vals AI)47.8%Not measuredOnly Claude Fable 5.1 measured
MMMU Pro (Vals AI)90.6%89.0%Claude Fable 5.1
GPQA Diamond (Artificial Analysis run)93.7%94.5%Gemini 3.7 Flash
Humanity's Last Exam (Artificial Analysis run)59.1%47.9%Claude Fable 5.1
GPQA Diamond (Epoch AI run)Not measured94.8%Only Gemini 3.7 Flash measured
ARC-AGI97.5%95.5%Claude Fable 5.1
ARC-AGI-290.0%84.6%Claude Fable 5.1
Chess puzzles48.0%66.0%Gemini 3.7 Flash
Mystery game puzzles58.0%37.0%Claude Fable 5.1
EBR-bench57.1%Not measuredOnly Claude Fable 5.1 measured
LMArena Text: hard prompts15281495Claude Fable 5.1
LMArena Text: expert15441512Claude Fable 5.1
LMArena Text: hard prompts in English15221487Claude Fable 5.1
LMArena Vision: diagrams13431329Claude Fable 5.1
LMArena Vision: homework13451320Claude Fable 5.1
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 Gemini 3.7 Flash
BenchmarkClaude Fable 5.1Gemini 3.7 FlashLeader
OTIS Mock AIME100.0%97.2%Claude Fable 5.1
FrontierMath, tiers 1 to 390.2%71.6%Claude Fable 5.1
FrontierMath, tier 487.8%36.6%Claude Fable 5.1
ProofBench100.0%58.0%Claude Fable 5.1
LMArena Text: math15311511Claude Fable 5.1
LMArena Text: mathematical work15411502Claude 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 index100
Knowledge benchmarks for Claude Fable 5.1 and Gemini 3.7 Flash
BenchmarkClaude Fable 5.1Gemini 3.7 FlashLeader
MMLU Pro92.4%90.1%Claude Fable 5.1
LegalBench (Vals AI)88.5%87.3%Claude Fable 5.1
TaxEval (Vals AI)76.0%74.7%Claude Fable 5.1
MortgageTax (Vals AI)70.8%66.7%Claude Fable 5.1
MedCode (Vals AI)53.5%53.4%Claude Fable 5.1
SimpleQA Verified70.8%69.2%Claude Fable 5.1
LMArena Text: science15321511Claude Fable 5.1
LMArena Text: medicine and healthcare15311494Claude Fable 5.1
LMArena Text: legal and government15141496Claude Fable 5.1
LMArena Text: business and finance14931479Claude Fable 5.1
Neither model has a result on the other 7 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index90
Web design benchmarks for Claude Fable 5.1 and Gemini 3.7 Flash
BenchmarkClaude Fable 5.1Gemini 3.7 FlashLeader
Design Arena: websites13131304Claude Fable 5.1
Design Arena: UI components13381299Claude Fable 5.1
Design Arena: game dev13821318Claude Fable 5.1
Design Arena: data viz13441315Claude Fable 5.1
Design Arena: 3D13931308Claude Fable 5.1
Design Arena: all code categories13361308Claude Fable 5.1
Design Arena: SVG13011283Claude Fable 5.1
Design Arena: ASCII art13241276Claude Fable 5.1
LiveBench design83.4%73.2%Claude Fable 5.1
GeneralLike-for-likePublic boards, shown as published, kept out of the index273
General benchmarks for Claude Fable 5.1 and Gemini 3.7 Flash
BenchmarkClaude Fable 5.1Gemini 3.7 FlashLeader
LiveBench data analysis80.3%68.0%Claude Fable 5.1
Public Benefits Bench (Vals AI)74.9%Not measuredOnly Claude Fable 5.1 measured
SAGE (Vals AI)48.5%49.2%Gemini 3.7 Flash
MedScribe (Vals AI)91.3%83.9%Claude Fable 5.1
Long context reasoning (AA-LCR)85.3%83.0%Claude Fable 5.1
DTBench97.6%96.8%Claude Fable 5.1
LMCA65.5%50.4%Claude Fable 5.1
Furniture assembly70.0%26.7%Claude Fable 5.1
LMArena Text15121489Claude Fable 5.1
LMArena Text: instruction following15181484Claude Fable 5.1
LMArena Text: creative writing15091488Claude Fable 5.1
LMArena Vision13191314Claude Fable 5.1
LMArena Text: English15061483Claude Fable 5.1
LMArena Text: non-English15081487Claude Fable 5.1
LMArena Text: Chinese15841552Claude Fable 5.1
LMArena Text: German14991506Gemini 3.7 Flash
LMArena Text: Japanese15621511Claude Fable 5.1
LMArena Text: Korean15171481Claude Fable 5.1
LMArena Text: French15231500Claude Fable 5.1
LMArena Text: Spanish15201495Claude Fable 5.1
LMArena Text: Russian15201515Claude Fable 5.1
LMArena Text: Polish15251503Claude Fable 5.1
LMArena Text: multi-turn14931485Claude Fable 5.1
LMArena Text: longer queries15241492Claude Fable 5.1
LMArena Text: writing and language15101491Claude Fable 5.1
LMArena Text: entertainment and media14971477Claude Fable 5.1
LMArena Vision: English13131309Claude Fable 5.1
LMArena Vision: Chinese13911394Gemini 3.7 Flash
LMArena Vision: reading text13271322Claude Fable 5.1
LMArena Vision: humor13181299Claude Fable 5.1
LMArena Vision: creative writing13301312Claude Fable 5.1
Neither model has a result on the other 15 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 Gemini 3.7 Flash
BenchmarkClaude Fable 5.1Gemini 3.7 FlashLeader
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
Gemini 3.7 Flash$0.0026Fits in one request

Gemini 3.7 Flash costs less

Repository review

50K input + 3K output tokens

Claude Fable 5.1$0.650Fits in one request
Gemini 3.7 Flash$0.049Fits in one request

Gemini 3.7 Flash costs less

Agent loop

200K input + 10K output tokens

Claude Fable 5.1$2.50Fits in one request
Gemini 3.7 Flash$0.188Fits in one request

Gemini 3.7 Flash 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 Gemini 3.7 Flash
SpecificationAnthropic Claude Fable 5.1Google Gemini 3.7 Flash
MakerAnthropicGoogle
WeightsNo public weights listedNo public weights listed
ReleasedSeptember 1, 2026August 13, 2026
Context window1M1.05M
Input $/Mtok$10.00$0.75
Output $/Mtok$50.00$3.75
Coding index89.169.9
Independent measurements behind it22
Cost per solved taskNot computable$1.78
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Fable 5.1 better than Gemini 3.7 Flash for coding?

Pick Claude Fable 5.1 for coding: it scores 89.1 on the Vibe Coding Index against 69.9 for Gemini 3.7 Flash. Pick Gemini 3.7 Flash when output tokens cost 13.3x less, or when the context window is larger, 1.05M against 1M tokens.

Which is cheaper, Claude Fable 5.1 or Gemini 3.7 Flash?

Claude Fable 5.1 costs $10.00 per million input tokens and $50.00 per million output tokens; Gemini 3.7 Flash costs $0.75 and $3.75. Cost per solved task is known for Gemini 3.7 Flash only.

Which has the bigger context window, Claude Fable 5.1 or Gemini 3.7 Flash?

Gemini 3.7 Flash, with 1.05M tokens against 1M.

How many benchmarks is the Claude Fable 5.1 vs Gemini 3.7 Flash comparison based on?

108 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 Gemini 3.7 Flash'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-5-1-vs-gemini-3-7-flash" title="Claude Fable 5.1 vs Gemini 3.7 Flash, 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-5-1-vs-gemini-3-7-flash">LLMBenchmark.ai, Claude Fable 5.1 vs Gemini 3.7 Flash</a></p>