Nova 2 Lite vs Claude Fable 5.1
Claude Fable 5.1 leads Nova 2 Lite on the Artificial Analysis Intelligence Index, 53.4 to 13.4, and Nova 2 Lite costs 20.0x less per output token ($2.50 vs $50.00 per million). Updated October 21, 2026; 31 benchmarks have a result for both.
vs boards won of 31 shared
Nova 2 Lite or Claude Fable 5.1: which to pick
Only Claude Fable 5.1 has a coding score, 84.2 on the Vibe Coding Index; Nova 2 Lite has none, so the two cannot be ranked on coding.
Pick Nova 2 Lite for output tokens 20.0x cheaper ($2.50 vs $50.00 per million).
Model ANova 2 LiteAmazonNot benchmarkedNo coding benchmarkNo cost per solved taskModel BClaude Fable 5.1Anthropic84.2/1005 independent benchmarksNo cost per solved task
- Shared results
- 31
- Nova 2 Lite only
- 0
- Claude Fable 5.1 only
- 93
- Like-for-like categories
- 6 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.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Only Claude Fable 5.1 has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
Claude Fable 5.1
Claude Fable 5.1 leads, 53.4 against 13.4.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Claude Fable 5.1 has a AA Agentic Index result, 57.9.
Directional only
Reasoning
GPQA Diamond
No call
Only Claude Fable 5.1 has a GPQA Diamond result, 93.4%.
Directional only
Knowledge
MMLU Pro
No call
Only Claude Fable 5.1 has a MMLU Pro result, 92.4%.
Directional only
Web design
Design Arena: websites
No call
Only Claude Fable 5.1 has a Design Arena: websites result, 1313.
Directional only
Long documents
Listed context window
No call
Both take 1M tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Nova 2 Lite
Nova 2 Lite $0.0015, Claude Fable 5.1 $0.035 per turn.
List prices
At a glance
- Coding index
- Nova 2 Lite not benchmarked, Claude Fable 5.1 84.2 from 5 benchmarks.
- Widest category
- Coding, 42.3 points apart on average over 4 shared benchmarks.
- Widest single gap
- ALE-Bench: Nova 2 Lite 236.3 against Claude Fable 5.1 2143.2, 63.6 points apart on a 0 to 100 scale.
- Output price
- Nova 2 Lite $2.50 against Claude Fable 5.1 $50.00 per million output tokens, 20.0x apart.
- Context window
- Both take 1M tokens.
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.
| Category | Nova 2 Lite | Bars | Claude Fable 5.1 | Ties |
|---|---|---|---|---|
| Coding | 0 | 4 | ||
| Intelligence | 0 | 1 | ||
| Reasoning | 0 | 3 | ||
| Math | 0 | 2 | ||
| Knowledge | 0 | 4 | ||
| General | 0 | 17 | ||
| All shared boards | 0 | 31 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index04
| Benchmark | Nova 2 Lite | Claude Fable 5.1 | Leader |
|---|---|---|---|
| LiveBench coding | Not measured | 97.7% | Only Claude Fable 5.1 measured |
| LMArena WebDev | Not measured | 1743 | Only Claude Fable 5.1 measured |
| AA Coding Index | 23.0 | 81.6 | Claude Fable 5.1 |
| LiveCodeBench (Vals AI) | Not measured | 90.5% | Only Claude Fable 5.1 measured |
| Terminal-Bench 4 (Vals AI) | Not measured | 58.1% | Only Claude Fable 5.1 measured |
| Vibe Code Bench (Vals AI) | Not measured | 90.3% | Only Claude Fable 5.1 measured |
| Code migration (Vals AI) | Not measured | 54.6% | Only Claude Fable 5.1 measured |
| ProgramBench (Vals AI) | Not measured | 7.0% | Only Claude Fable 5.1 measured |
| IOI (Vals AI) | Not measured | 90.8% | Only Claude Fable 5.1 measured |
| Terminal-Bench 2.1 (Vals AI) | Not measured | 85.0% | Only Claude Fable 5.1 measured |
| SWE-bench Multimodal (Vals AI) | Not measured | 61.3% | Only Claude Fable 5.1 measured |
| Vibe Code Bench 1-100 (Vals AI) | Not measured | 28.0% | Only Claude Fable 5.1 measured |
| SkillsBench (Vals AI) | Not measured | 61.5% | Only Claude Fable 5.1 measured |
| CyberBench (Vals AI) | Not measured | 70.4% | Only Claude Fable 5.1 measured |
| SciCode | Not measured | 63.1% | Only Claude Fable 5.1 measured |
| FrontierCode | Not measured | 50.9% | Only Claude Fable 5.1 measured |
| FrontierSWE | Not measured | 56.3% | Only Claude Fable 5.1 measured |
| GSO-Bench | Not measured | 88.2% | Only Claude Fable 5.1 measured |
| WeirdML | Not measured | 92.9% | Only Claude Fable 5.1 measured |
| MirrorCode | Not measured | 73.3% | Only Claude Fable 5.1 measured |
| ALE-Bench | 236.3 | 2143.2 | Claude Fable 5.1 |
| LMArena Text: coding | 1385 | 1532 | Claude Fable 5.1 |
| LMArena Text: software and IT | 1394 | 1530 | Claude Fable 5.1 |
| LMArena WebDev: React | Not measured | 1792 | Only Claude Fable 5.1 measured |
| LMArena WebDev: HTML | Not measured | 1684 | Only Claude Fable 5.1 measured |
| LMArena WebDev: from an image | Not measured | 1722 | Only Claude Fable 5.1 measured |
| Neither model has a result on the other 13 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Nova 2 Lite | Claude Fable 5.1 | Leader |
|---|---|---|---|
| AA Intelligence Index | 13.4 | 53.4 | Claude Fable 5.1 |
| Epoch Capabilities Index | Not measured | 166.5 | Only Claude Fable 5.1 measured |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index24 boards, none shared
| Benchmark | Nova 2 Lite | Claude Fable 5.1 | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 57.9 | Only Claude Fable 5.1 measured |
| Design Arena: agents building web apps | Not measured | 1318 | Only Claude Fable 5.1 measured |
| Design Arena: agents building full-stack apps | Not measured | 1326 | Only Claude Fable 5.1 measured |
| Design Arena: agents building mobile apps | Not measured | 1267 | Only Claude Fable 5.1 measured |
| Design Arena: agents building Godot games | Not measured | 1327 | Only Claude Fable 5.1 measured |
| Design Arena: PowerPoint slides | Not measured | 1327 | Only Claude Fable 5.1 measured |
| Design Arena: spreadsheets | Not measured | 1365 | Only Claude Fable 5.1 measured |
| LiveBench research | Not measured | 82.0% | Only Claude Fable 5.1 measured |
| LiveBench browser | Not measured | 100.0% | Only Claude Fable 5.1 measured |
| LiveBench long agentic | Not measured | 80.8% | Only Claude Fable 5.1 measured |
| SREBench (Vals AI) | Not measured | 22.9% | Only Claude Fable 5.1 measured |
| Finance Agent (Vals AI) | Not measured | 58.9% | Only Claude Fable 5.1 measured |
| Tax Agent Bench (Vals AI) | Not measured | 49.2% | Only Claude Fable 5.1 measured |
| Legal Research Bench (Vals AI) | Not measured | 55.3% | Only Claude Fable 5.1 measured |
| Excel Modeling Benchmark (Vals AI) | Not measured | 76.7% | Only Claude Fable 5.1 measured |
| Terminal-Bench-Science (Vals AI) | Not measured | 40.0% | Only Claude Fable 5.1 measured |
| Time Horizon Index (Vals AI) | Not measured | 63.3% | Only Claude Fable 5.1 measured |
| CUA-bench (Vals AI) | Not measured | 13.2% | Only Claude Fable 5.1 measured |
| Robo-bench (Vals AI) | Not measured | 5.8% | Only Claude Fable 5.1 measured |
| APEX-Agents | Not measured | 68.6% | Only Claude Fable 5.1 measured |
| Remote Labor Index | Not measured | 17.9% | Only Claude Fable 5.1 measured |
| SpireClimb | Not measured | 2.0% | Only Claude Fable 5.1 measured |
| Vending-Bench 2 | Not measured | $5,422 | Only Claude Fable 5.1 measured |
| LMArena Search | Not measured | 1246 | Only Claude Fable 5.1 measured |
| Neither model has a result on the other 17 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index03
| Benchmark | Nova 2 Lite | Claude Fable 5.1 | Leader |
|---|---|---|---|
| GPQA Diamond | Not measured | 93.4% | Only Claude Fable 5.1 measured |
| LiveBench reasoning | Not measured | 91.7% | Only Claude Fable 5.1 measured |
| MysteryMechanism (Vals AI) | Not measured | 47.8% | Only Claude Fable 5.1 measured |
| MMMU Pro (Vals AI) | Not measured | 90.6% | Only Claude Fable 5.1 measured |
| GPQA Diamond (Artificial Analysis run) | Not measured | 93.7% | Only Claude Fable 5.1 measured |
| Humanity's Last Exam (Artificial Analysis run) | Not measured | 59.1% | Only Claude Fable 5.1 measured |
| ARC-AGI | Not measured | 97.5% | Only Claude Fable 5.1 measured |
| ARC-AGI-2 | Not measured | 90.0% | Only Claude Fable 5.1 measured |
| Chess puzzles | Not measured | 48.0% | Only Claude Fable 5.1 measured |
| Mystery game puzzles | Not measured | 58.0% | Only Claude Fable 5.1 measured |
| EBR-bench | Not measured | 57.1% | Only Claude Fable 5.1 measured |
| LMArena Text: hard prompts | 1364 | 1528 | Claude Fable 5.1 |
| LMArena Text: expert | 1359 | 1544 | Claude Fable 5.1 |
| LMArena Text: hard prompts in English | 1385 | 1522 | Claude Fable 5.1 |
| LMArena Vision: diagrams | Not measured | 1343 | Only Claude Fable 5.1 measured |
| LMArena Vision: homework | Not measured | 1345 | Only Claude Fable 5.1 measured |
| Neither model has a result on the other 6 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | Nova 2 Lite | Claude Fable 5.1 | Leader |
|---|---|---|---|
| OTIS Mock AIME | Not measured | 100.0% | Only Claude Fable 5.1 measured |
| FrontierMath, tiers 1 to 3 | Not measured | 90.2% | Only Claude Fable 5.1 measured |
| FrontierMath, tier 4 | Not measured | 87.8% | Only Claude Fable 5.1 measured |
| ProofBench | Not measured | 100.0% | Only Claude Fable 5.1 measured |
| LMArena Text: math | 1359 | 1531 | Claude Fable 5.1 |
| LMArena Text: mathematical work | 1369 | 1541 | Claude 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 index04
| Benchmark | Nova 2 Lite | Claude Fable 5.1 | Leader |
|---|---|---|---|
| MMLU Pro | Not measured | 92.4% | Only Claude Fable 5.1 measured |
| LegalBench (Vals AI) | Not measured | 88.5% | Only Claude Fable 5.1 measured |
| TaxEval (Vals AI) | Not measured | 76.0% | Only Claude Fable 5.1 measured |
| MortgageTax (Vals AI) | Not measured | 70.8% | Only Claude Fable 5.1 measured |
| MedCode (Vals AI) | Not measured | 53.5% | Only Claude Fable 5.1 measured |
| SimpleQA Verified | Not measured | 70.8% | Only Claude Fable 5.1 measured |
| LMArena Text: science | 1382 | 1532 | Claude Fable 5.1 |
| LMArena Text: medicine and healthcare | 1386 | 1531 | Claude Fable 5.1 |
| LMArena Text: legal and government | 1359 | 1514 | Claude Fable 5.1 |
| LMArena Text: business and finance | 1369 | 1493 | Claude Fable 5.1 |
| Neither model has a result on the other 8 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
| Benchmark | Nova 2 Lite | Claude Fable 5.1 | Leader |
|---|---|---|---|
| Design Arena: websites | Not measured | 1313 | Only Claude Fable 5.1 measured |
| Design Arena: UI components | Not measured | 1339 | Only Claude Fable 5.1 measured |
| Design Arena: game dev | Not measured | 1381 | Only Claude Fable 5.1 measured |
| Design Arena: data viz | Not measured | 1344 | Only Claude Fable 5.1 measured |
| Design Arena: 3D | Not measured | 1393 | Only Claude Fable 5.1 measured |
| Design Arena: all code categories | Not measured | 1336 | Only Claude Fable 5.1 measured |
| Design Arena: SVG | Not measured | 1301 | Only Claude Fable 5.1 measured |
| Design Arena: ASCII art | Not measured | 1323 | Only Claude Fable 5.1 measured |
| LiveBench design | Not measured | 83.4% | Only Claude Fable 5.1 measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index017
| Benchmark | Nova 2 Lite | Claude Fable 5.1 | Leader |
|---|---|---|---|
| LiveBench data analysis | Not measured | 80.3% | Only Claude Fable 5.1 measured |
| Public Benefits Bench (Vals AI) | Not measured | 74.9% | Only Claude Fable 5.1 measured |
| SAGE (Vals AI) | Not measured | 48.5% | Only Claude Fable 5.1 measured |
| MedScribe (Vals AI) | Not measured | 91.3% | Only Claude Fable 5.1 measured |
| Long context reasoning (AA-LCR) | Not measured | 85.3% | Only Claude Fable 5.1 measured |
| DTBench | Not measured | 97.6% | Only Claude Fable 5.1 measured |
| LMCA | Not measured | 65.5% | Only Claude Fable 5.1 measured |
| Furniture assembly | Not measured | 70.0% | Only Claude Fable 5.1 measured |
| LMArena Text | 1362 | 1512 | Claude Fable 5.1 |
| LMArena Text: instruction following | 1335 | 1518 | Claude Fable 5.1 |
| LMArena Text: creative writing | 1292 | 1509 | Claude Fable 5.1 |
| LMArena Vision | Not measured | 1319 | Only Claude Fable 5.1 measured |
| LMArena Text: English | 1385 | 1506 | Claude Fable 5.1 |
| LMArena Text: non-English | 1337 | 1508 | Claude Fable 5.1 |
| LMArena Text: Chinese | 1364 | 1584 | Claude Fable 5.1 |
| LMArena Text: German | 1343 | 1499 | Claude Fable 5.1 |
| LMArena Text: Japanese | 1273 | 1562 | Claude Fable 5.1 |
| LMArena Text: Korean | 1281 | 1517 | Claude Fable 5.1 |
| LMArena Text: French | 1381 | 1523 | Claude Fable 5.1 |
| LMArena Text: Spanish | 1375 | 1520 | Claude Fable 5.1 |
| LMArena Text: Russian | 1342 | 1520 | Claude Fable 5.1 |
| LMArena Text: Polish | 1327 | 1525 | Claude Fable 5.1 |
| LMArena Text: multi-turn | 1338 | 1493 | Claude Fable 5.1 |
| LMArena Text: longer queries | 1335 | 1524 | Claude Fable 5.1 |
| LMArena Text: writing and language | 1318 | 1510 | Claude Fable 5.1 |
| LMArena Text: entertainment and media | 1309 | 1497 | Claude Fable 5.1 |
| LMArena Vision: English | Not measured | 1313 | Only Claude Fable 5.1 measured |
| LMArena Vision: Chinese | Not measured | 1391 | Only Claude Fable 5.1 measured |
| LMArena Vision: reading text | Not measured | 1327 | Only Claude Fable 5.1 measured |
| LMArena Vision: humor | Not measured | 1318 | Only Claude Fable 5.1 measured |
| LMArena Vision: creative writing | Not measured | 1330 | Only Claude Fable 5.1 measured |
| 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
| Benchmark | Nova 2 Lite | Claude Fable 5.1 | Leader |
|---|---|---|---|
| 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
Nova 2 Lite$0.0015Fits in one request
Claude Fable 5.1$0.035Fits in one request
Nova 2 Lite costs less
Repository review
50K input + 3K output tokens
Nova 2 Lite$0.022Fits in one request
Claude Fable 5.1$0.650Fits in one request
Nova 2 Lite costs less
Agent loop
200K input + 10K output tokens
Nova 2 Lite$0.085Fits in one request
Claude Fable 5.1$2.50Fits in one request
Nova 2 Lite 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.
| Specification | Amazon Nova 2 Lite | Anthropic Claude Fable 5.1 |
|---|---|---|
| Maker | Amazon | Anthropic |
| Weights | No public weights listed | No public weights listed |
| Released | December 2, 2025 | September 1, 2026 |
| Context window | 1M | 1M |
| Input $/Mtok | $0.30 | $10.00 |
| Output $/Mtok | $2.50 | $50.00 |
| Coding index | Not benchmarked | 84.2 |
| Independent measurements behind it | 0 | 5 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Nova 2 Lite better than Claude Fable 5.1 for coding?
Only Claude Fable 5.1 has a coding score, 84.2 on the Vibe Coding Index; Nova 2 Lite has none, so the two cannot be ranked on coding. Pick Nova 2 Lite for output tokens 20.0x cheaper ($2.50 vs $50.00 per million).
Which is cheaper, Nova 2 Lite or Claude Fable 5.1?
Nova 2 Lite costs $0.30 per million input tokens and $2.50 per million output tokens; Claude Fable 5.1 costs $10.00 and $50.00. Cost per solved task is known for neither of them.
Which has the bigger context window, Nova 2 Lite or Claude Fable 5.1?
Neither: both take 1M tokens.
How many benchmarks is the Nova 2 Lite vs Claude Fable 5.1 comparison based on?
31 benchmarks have a result for both models as of October 21, 2026. Nova 2 Lite's coding index rests on 0 independent benchmarks and Claude Fable 5.1's on 5. Where only one model has a result, the page says so instead of naming a winner.