Claude Opus 5 vs Claude Fable 5

Claude Opus 5 from Anthropic and Claude Fable 5 from Anthropic are shown side by side so you can compare pricing, model IDs, context and output limits, modalities, tool use, release details, and benchmark results where data is available.

Overall Recommendation

Claude Opus 5 is the stronger default in TokenHub data: it costs 50% less per token while posting a 60.7 Intelligence Index and 78.0 Coding Index versus 59.9 and 62.0 for Claude Fable 5. Choose Fable 5 when its Mythos-level positioning, memory-oriented long-running work, and slightly higher HLE score matter more.

Recommendation based on Claude Opus 5 (Adaptive Reasoning, Max Effort) vs Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback).

Comparison Highlights

Claude Opus 5Anthropic
Claude Fable 5Anthropic
Best For
Frontier codingdemanding reasoningcost-efficient flagship production
Ambitious long-running projectsautonomous knowledge worksubagent collaboration
How To Read ItUse-case synthesis from model capabilities and positioning.
Workload Fit
CodingReasoningValue
Long projectsKnowledge workSubagents
How To Read ItThe workloads each model is most directly shaped for.
Input
$5/MEdge
$10/M
How To Read ItLower is better when prompts or retrieval payloads are large.
Output
$25/MEdge
$50/M
How To Read ItLower is better for reasoning-heavy or long-generation traffic.
Context length
1M
1M
How To Read ItHigher is better for repositories, retrieval packs, and transcripts.
Input modalities
Text, Image, PDF
Text, Image, PDF
How To Read ItBroader input support reduces the need for separate vision or video models.

Model Selection Guide

Claude Opus 5Anthropic

Choose Claude Opus 5 When

  • $5 input and $25 output per million tokens, versus $10 and $50 for Claude Fable 5
  • A 60.7 Intelligence Index and 78.0 Coding Index, versus 59.9 and 62.0
  • A 93.2 GPQA score and 89.1 Terminal-Bench 2.1 score
Claude Fable 5Anthropic

Choose Claude Fable 5 When

  • A 53.3 HLE score, slightly above Claude Opus 5 at 52.6
  • Mythos-level positioning for long-running autonomy, memory, and subagent work
  • A 98.5 τ²-Bench score for realistic agent workflows

Basic Information

Claude Opus 5Anthropic
Claude Fable 5Anthropic

Name

Claude Opus 5Claude Opus 5

Model id

Claude Opus 5claude-opus-5

Intro

Claude Opus 5Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis of charts and documents, complex office deliverables, and coordinating parallel subagents. The model maintains strong instruction following and tool use across extended tasks, while remaining effective at lower effort settings for workloads that prioritize latency and token efficiency.

Author

Claude Opus 5Anthropic

Released date

Claude Opus 52026-07-24

Context length

Claude Opus 51M

Max output tokens

Claude Opus 5128K

Name

Claude Fable 5Claude Fable 5

Model id

Claude Fable 5claude-fable-5

Intro

Claude Fable 5Claude Fable 5 is presented as a Mythos-level Claude model for ambitious, long-running projects. Source pages emphasize autonomous knowledge work, software engineering, vision, memory, and the ability to work for extended periods with sub-agents. Its description should feel more like a project-level collaborator than a short-turn assistant.

Author

Claude Fable 5Anthropic

Released date

Claude Fable 52026-06-09

Context length

Claude Fable 51M

Max output tokens

Claude Fable 5128K

Pricing

Claude Opus 5Anthropic
Claude Fable 5Anthropic

Input

Claude Opus 5$5/M

Output

Claude Opus 5$25/M

Cached input

Claude Opus 5$0.5/M

Input

Claude Fable 5$10/M

Output

Claude Fable 5$50/M

Cached input

Claude Fable 5$1/M

Capabilities

Claude Opus 5Anthropic
Claude Fable 5Anthropic

Reasoning

Claude Opus 5

Knowledge

Claude Opus 52026-05-01

Attachment

Claude Opus 5

Input modalities

Claude Opus 5Text, Image, PDF

Output modalities

Claude Opus 5Text

Temperature

Claude Opus 5

Tool use

Claude Opus 5

Reasoning

Claude Fable 5

Knowledge

Claude Fable 52026-01-31

Attachment

Claude Fable 5

Input modalities

Claude Fable 5Text, Image, PDF

Output modalities

Claude Fable 5Text

Temperature

Claude Fable 5

Tool use

Claude Fable 5

Benchmark

Claude Opus 5Anthropic
Claude Fable 5Anthropic

Intelligence

wins60.7

Coding

wins78

Intelligence

59.9

Coding

62

Knowledge & Reasoning

GPQA

wins93.2%

HLE

52.6%

GPQA

92.6%

HLE

wins53.3%

Coding

SciCode

55.7%

Terminal-Bench Hard

n/a

SciCode

wins60.2%

Terminal-Bench Hard

wins62.9%

Instruction Following & Agent Tasks

IFBench

n/a

AA-LCR

70%

Tau2

n/a

IFBench

wins63.5%

AA-LCR

70%

Tau2

wins98.5%

FAQ

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

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Claude Opus 5 and Claude Fable 5 should be compared by workload. This page places price, context, output limits, capabilities, and benchmark data side by side. It is also relevant to: claude opus 5 vs claude fable 5, opus 5 vs fable 5, claude opus vs fable.

Is Claude Fable 5 cheaper than Claude Opus 5?

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Use the pricing rows above to compare input, output, and cached input prices for Claude Opus 5 and Claude Fable 5.

Which model supports a longer context length?

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Claude Opus 5 lists 1M context length, while Claude Fable 5 lists 1M.

Can I access both models through TokenHub?

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If both models are available in the TokenHub catalog, you can route requests to Claude Opus 5 and Claude Fable 5 through the TokenHub API.