Claude Fable 5.1 vs Claude Sonnet 5: Pricing, Quality, Value, and Benchmarks | PickAIModel
PickAIModel.com - Compare Claude Fable 5.1 and Claude Sonnet 5
Claude Fable 5.1 vs Claude Sonnet 5: pricing, Quality, Value, and benchmarks
Side-by-side buyer comparison built from the current published top 10 snapshot. Quality and Value stay deterministic, while editorial verdict excerpts remain clearly AI-labeled.
Provisional evidenceVerified evidence
Claude Fable 5.1 Quality
100.0
Claude Sonnet 5 Quality
59.7
Quality delta
+40.3Claude Fable 5.1 leads
Value delta
+27.2Claude Fable 5.1 leads
Buyer summary
Claude Fable 5.1 leads Quality by 40.3 points. Claude Fable 5.1 leads Value by 27.2 points.
Shared roster
Both pages link back to the same published roster and methodology, so the comparison stays on one deterministic evidence set.
Anthropic's newest generally available Fable model leads the current scored evidence, with premium $10/$50 token pricing and safeguard fallback for some flagged requests.
Monthly price
Claude Pro: $20/month
App access
Claude
Conversation benchmark
~196 chats
Verified vendor fact
Consumer plan pricing is grounded in the current official vendor plan page.
Verified vendor fact
Hosted app availability is grounded in the current official vendor surface.
Quality rank 1 and value rank 3 in the current published roster.
Claude Sonnet 5
Q 59.7
V 12.8
Quality rank 5 and value rank 6 in the current published roster.
Buyer access
Pricing, app access, and Conversation Value
Claude Fable 5.1
Verified vendor fact3K tokens/chat
Claude Pro: $20/month
~196 chats
Hosted app: Claude
Claude Sonnet 5
Benchmark evidence
Claude Fable 5.1
Verified evidence
Humanity's Last Exam
Normalized quality input
59.1%
Artificial Analysis Claude Fable 5.1 evaluation | Independent HLE result using adaptive reasoning at maximum effort with Anthropic default safeguard fallback.
SWE-Bench Pro
Normalized quality input
81.2%
Anthropic Claude Fable 5.1 and Mythos 5.1 system card | Vendor-reported SWE-Bench Pro result using adaptive thinking at maximum effort and default sampling settings.
Terminal-Bench 2.1
Agentic terminal task completion
91.4%
Artificial Analysis Claude Fable 5.1 analysis | Independent Terminal-Bench 2.1 result using adaptive reasoning at maximum effort with default safeguard fallback.
GPQA Diamond
Normalized quality input
Editorial excerpt
Claude Fable 5.1
AI-assisted, editorially reviewed
Anthropic's newest generally available Fable model leads the current scored evidence, with premium $10/$50 token pricing and safeguard fallback for some flagged requests.
Claude Fable 5.1 combines the strongest current locked-variant HLE and SWE-Bench Pro evidence with a 1M-token context window. Its $10 per million input-token and $50 per million output-token prices make it a specialist choice for difficult coding and knowledge work, while safeguard fallback means integrations should surface the model identity returned by the API.
Editorial excerpt
Claude Sonnet 5
AI-assisted, editorially reviewed
Ship Claude Sonnet 5 as the default Sonnet upgrade for production coding, agentic, and long-context workloads; budget for the September price step-up and reserve Opus for tasks that justify the higher tier.
Continue Research
Move from the head-to-head page back into the full roster.
Ship Claude Sonnet 5 as the default Sonnet upgrade for production coding, agentic, and long-context workloads; budget for the September price step-up and reserve Opus for tasks that justify the higher tier.
Monthly price
Claude Pro: $20/month
App access
Claude
Conversation benchmark
~980 chats
Deterministic
Claude Pro public monthly plan reference.
Deterministic
Claude Sonnet 5 is available in Claude and through the Claude API.
Deterministic
3K tokens/chat
Claude Pro: $20/month
~980 chats
Hosted app: Claude
93.7%
Artificial Analysis Claude Fable 5.1 evaluation
Benchmark evidence
Claude Sonnet 5
Verified evidence
Humanity's Last Exam
Normalized quality input
43.2%
Anthropic Claude Sonnet 5 system card | Vendor-reported Anthropic Sonnet 5 HLE no-tools score. Do not replace with tools-enabled HLE variants.
SWE-Bench Pro
Software engineering task resolution
63.2%
Anthropic Claude Sonnet 5 system card | Vendor-reported Anthropic Sonnet 5 SWE-Bench Pro score. Do not substitute SWE-Bench Verified.
Terminal-Bench 2.1
Agentic terminal task completion
80.4%
Anthropic Claude Sonnet 5 system card | Vendor-reported Anthropic Sonnet 5 Terminal-Bench 2.1 score using mini-SWE-agent. Display-only companion evidence.
AA-Omniscience
AA-Omniscience Index
15.3
Artificial Analysis AA-Omniscience evaluation | Independent Artificial Analysis result for Claude Sonnet 5 (max). Display-only; this row does not affect Quality or Value scores.
Claude Sonnet 5 is the right default Sonnet model for most production teams that want stronger coding, agentic, and multi-step performance without moving every workload to Opus. It replaces Sonnet 4.6 in the current Claude lineup, carries stronger accepted-source HLE and SWE-Bench Pro evidence, and adds a 1M token context window that materially improves RAG, repository-scale coding, and document-heavy workflows. The migration still deserves an engineering review: the public row uses Anthropic vendor-reported benchmark evidence, the introductory API price ends after August 31, 2026, and plan-level availability or limits can vary by Claude surface. Treat it as the new default, test your real prompts and retrieval payloads, and route to Opus only when the task genuinely needs the higher-cost tier.