Model Comparison

Claude Fable 5 vs Claude Opus 5Which is better in 2026?

Claude Opus 5 has a slight edge in benchmark performance. Claude Opus 5 is 2.0x cheaper per token.

Verdict: Claude Fable 5 vs Claude Opus 5 — which is better?

Claude Fable 5 (by Anthropic) and Claude Opus 5 (by Anthropic) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Fable 5 outperforms in 4 benchmarks (DeepSWE 1.1, FrontierCode 1.1, HealthBench Professional, Legal Agent Benchmark), while Claude Opus 5 is better at 5 benchmarks (AutomationBench, BioMysteryBench, FrontierCode, GDPval-AA, Humanity's Last Exam). Claude Opus 5 has a slight edge in benchmark performance.

On price, Claude Opus 5 is roughly 2.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose Claude Fable 5 if…

  • you want predictable pricing at $10.00/M input and $50.00/M output

Choose Claude Opus 5 if…

  • you want the strongest raw capability — it leads on 5 of 9 shared benchmarks
  • cost matters — it's about 2.0x cheaper per token
  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

9 benchmarks

Claude Fable 5 outperforms in 4 benchmarks (DeepSWE 1.1, FrontierCode 1.1, HealthBench Professional, Legal Agent Benchmark), while Claude Opus 5 is better at 5 benchmarks (AutomationBench, BioMysteryBench, FrontierCode, GDPval-AA, Humanity's Last Exam).

Claude Opus 5 has a slight edge in benchmark performance.

Sat Jul 25 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude Opus 5 costs less

For input processing, Claude Fable 5 ($10.00/1M tokens) is 2.0x more expensive than Claude Opus 5 ($5.00/1M tokens).

For output processing, Claude Fable 5 ($50.00/1M tokens) is 2.0x more expensive than Claude Opus 5 ($25.00/1M tokens).

In conclusion, Claude Fable 5 is more expensive than Claude Opus 5.*

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

Lowest available price from all providers
Sat Jul 25 2026 • llm-stats.com
Anthropic
Claude Fable 5
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
Anthropic
Claude Opus 5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
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. Both models can generate responses up to 128,000 tokens.

Anthropic
Claude Fable 5
Input1,000,000 tokens
Output128,000 tokens
Anthropic
Claude Opus 5
Input1,000,000 tokens
Output128,000 tokens
Sat Jul 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Fable 5 and Claude Opus 5 support multimodal inputs.

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

Claude Fable 5

Text
Images
Audio
Video

Claude Opus 5

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

Proprietary

Closed source

Claude Opus 5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Fable 5 was released on 2026-06-09, while Claude Opus 5 was released on 2026-07-24.

Claude Opus 5 is 2 months newer than Claude Fable 5.

Claude Fable 5

Jun 9, 2026

1 months ago

Claude Opus 5

Jul 24, 2026

0 days ago

1mo newer

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 is available from Anthropic. Claude Opus 5 is available from Anthropic.

Claude Fable 5

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

Claude Opus 5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Higher DeepSWE 1.1 score (70.0% vs 68.8%)
Higher FrontierCode 1.1 score (53.5% vs 53.4%)
Higher HealthBench Professional score (66.0% vs 59.8%)
Higher Legal Agent Benchmark score (13.3% vs 11.7%)
Anthropic
Less expensive input tokens
Less expensive output tokens
Higher AutomationBench score (26.0% vs 17.4%)
Higher BioMysteryBench score (90.1% vs 46.1%)
Higher FrontierCode score (53.4% vs 46.3%)
Higher GDPval-AA score (62.0% vs 60.5%)
Higher Humanity's Last Exam score (64.7% vs 64.5%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Fable 5 and Claude Opus 5 side-by-side, then vote on the output you prefer.

Claude Fable 5
✓ Preferred
Claude Opus 5
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Fable 5
Anthropic
Claude Opus 5

FAQ

Common questions about Claude Fable 5 vs Claude Opus 5.

Which is better, Claude Fable 5 or Claude Opus 5?

Claude Opus 5 has a slight edge in benchmark performance. Claude Fable 5 is made by Anthropic and Claude Opus 5 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Fable 5 compare to Claude Opus 5 in benchmarks?

Claude Fable 5 scores SWE-Bench Verified: 95.0%, FrontierSWE: 90.0%, OSWorld-Verified: 85.0%, Terminal-Bench 2.1: 84.3%, SWE-Bench Pro: 80.0%. Claude Opus 5 scores BrowseComp: 90.8%, BioMysteryBench: 90.1%, OSWorld 2.0: 70.6%, DeepSWE 1.1: 68.8%, Humanity's Last Exam: 64.7%.

Is Claude Fable 5 cheaper than Claude Opus 5?

Claude Opus 5 is 2.0x cheaper for input tokens. Claude Fable 5 costs $10.00/M input and $50.00/M output via anthropic. Claude Opus 5 costs $5.00/M input and $25.00/M output via anthropic.

What are the context window sizes for Claude Fable 5 and Claude Opus 5?

Claude Fable 5 supports 1.0M tokens and Claude Opus 5 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 and Claude Opus 5?

Key differences include input pricing ($10.00 vs $5.00/M). See the full comparison above for benchmark-by-benchmark results.

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