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Claude Fable 5.1 vs Nova 2 Sonic

Claude Fable 5.1 leads the LLM Stats Score 56.8 to 9.2. Nova 2 Sonic is 21.4x cheaper per token.

Anthropic · Amazon · Updated for 2026

Which is better?

Claude Fable 5.1 leads the overall LLM Stats Score 56.8 to 9.2, ranking #2 overall.

On price, Nova 2 Sonic is roughly 21.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Fable 5.1

  • overall performance matters — it scores 56.8 and ranks #2 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Nova 2 Sonic

  • cost matters — it's about 21.4x cheaper per token

At a glance

The differences that matter most.

Claude Fable 5.1
Anthropic
Nova 2 Sonic
Amazon
Core performance indexes
LLM Stats Score
56.8
#2
9.2
#260
Reasoning
53.9
#5
11.6
#241
Cost, coverage & limits
Benchmark wins
—
—
Input price
$10.00 / M
$0.33 / M
Output price
$50.00 / M
$2.75 / M
Context window
1,000,000
1,000,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Fable 5.1
Nova 2 Sonic
Tool use
30.7#12
12.6#98
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

7 reported for Claude Fable 5.1 · 4 for Nova 2 Sonic

No common benchmarks found

Claude Fable 5.1 and Nova 2 Sonicdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Nova 2 Sonic costs less

For input processing, Claude Fable 5.1 ($10.00/1M tokens) is 30.3x more expensive than Nova 2 Sonic ($0.33/1M tokens).

For output processing, Claude Fable 5.1 ($50.00/1M tokens) is 18.2x more expensive than Nova 2 Sonic ($2.75/1M tokens).

In conclusion, Claude Fable 5.1 is more expensive than Nova 2 Sonic.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri Sep 04 2026 • llm-stats.com
Anthropic
Claude Fable 5.1
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
Amazon
Nova 2 Sonic
Input tokens$0.33
Output tokens$2.75
Best providerAWS Bedrock
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,000,000 tokens. Claude Fable 5.1 can generate longer responses up to 128,000 tokens, while Nova 2 Sonic is limited to 65,536 tokens.

Anthropic
Claude Fable 5.1
Input1,000,000 tokens
Output128,000 tokens
Amazon
Nova 2 Sonic
Input1,000,000 tokens
Output65,536 tokens
Fri Sep 04 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Fable 5.1 and Nova 2 Sonic support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Fable 5.1

Text
Images
Audio
Video

Nova 2 Sonic

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Fable 5.1

Proprietary

Closed source

Nova 2 Sonic

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Fable 5.1 was released on 2026-09-01, while Nova 2 Sonic was released on 2025-12-02.

Claude Fable 5.1 is 9 months newer than Nova 2 Sonic.

Claude Fable 5.1

Sep 1, 2026

3 days ago

9mo newer
Nova 2 Sonic

Dec 2, 2025

9 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude Fable 5.1 is available from Anthropic. Nova 2 Sonic is available from Bedrock.

Claude Fable 5.1

anthropic logo
Anthropic
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M

Nova 2 Sonic

bedrock logo
AWS Bedrock
Input Price:Input: $0.33/1MOutput Price:Output: $2.75/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Fable 5.1 and Nova 2 Sonic side-by-side, then vote on the output you prefer.

Claude Fable 5.1
✓ Preferred
Nova 2 Sonic
Open in Playground

FAQ

Common questions about Claude Fable 5.1 vs Nova 2 Sonic.

Which is better, Claude Fable 5.1 or Nova 2 Sonic?

Claude Fable 5.1 leads the LLM Stats Score 56.8 to 9.2. Claude Fable 5.1 is made by Anthropic and Nova 2 Sonic is made by Amazon. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Fable 5.1 compare to Nova 2 Sonic in benchmarks?

Claude Fable 5.1 scores OSWorld 2.0: 77.9%, CursorBench v3.2: 73.4%, Humanity's Last Exam: 65.0%, GDPval-AA: 61.8%, Terminal-Bench 4.0: 55.8%. Nova 2 Sonic scores Big Bench Audio: 87.0%, BFCL: 74.5%, ComplexFuncBench: 65.2%, IFBench: 37.5%.

Is Claude Fable 5.1 cheaper than Nova 2 Sonic?

Nova 2 Sonic is 30.3x cheaper for input tokens. Claude Fable 5.1 costs $10.00/M input and $50.00/M output via anthropic. Nova 2 Sonic costs $0.33/M input and $2.75/M output via bedrock.

What are the context window sizes for Claude Fable 5.1 and Nova 2 Sonic?

Claude Fable 5.1 supports 1.0M tokens and Nova 2 Sonic supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Fable 5.1 and Nova 2 Sonic?

Key differences include LLM Stats Score (56.8 vs 9.2), input pricing ($10.00 vs $0.33/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5.1 and Nova 2 Sonic?

Claude Fable 5.1 is developed by Anthropic and Nova 2 Sonic is developed by Amazon.

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