Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

Anthropic: Claude Fable Latest vs Claude Sonnet 4.5 benchmark

Name: Anthropic: Claude Fable Latest vs Claude Sonnet 4.5 AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Anthropic: Claude Fable Latest (~anthropic) and Claude Sonnet 4.5 (Anthropic) using the latest snapshots we have as of Aug 17, 2026. Claude Sonnet 4.5 wins on output price at $15/1M. Anthropic: Claude Fable Latest has the larger context window (1M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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~anthropic

Anthropic: Claude Fable Latest

Auto-discovered from OpenRouter (~anthropic/claude-fable-latest). Preview until a second source matches.

$50/1M out

Anthropic

Claude Sonnet 4.5

Workhorse Anthropic model: most of Opus coding quality at a mid-tier price.

Sonnet 4.5Elo 1,524$15/1M out

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Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude 3.7 Sonnet vs GPT-5

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Anthropic: Claude Fable Latest (0)vsClaude Sonnet 4.5 (9)

Anthropic: Claude Fable Latest: 0W (0%)Overall: Claude Sonnet 4.5Claude Sonnet 4.5: 9W (100%)

← Anthropic: Claude Fable Latest1 tiesClaude Sonnet 4.5 →

Claude Sonnet 4.5 (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

—vs1,524

Coding Elo

—vs1,531

SWE-bench

—vs70.1%

LiveBench

—vs67.4%

GPQA Diamond

—vs80.2%

Anthropic: Claude Fable Latest: 0WClaude Sonnet 4.5: 5W

Claude Sonnet 4.5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

—vs88 tok/s

Time to first token

—vs240 ms

Anthropic: Claude Fable Latest: 0WClaude Sonnet 4.5: 2W

Claude Sonnet 4.5 (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$50/1Mvs$15/1M

Input price

$10/1Mvs$3/1M

Context window

1Mvs1M

Anthropic: Claude Fable Latest: 0WClaude Sonnet 4.5: 2W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageClaude Sonnet 4.5 5/6

Preference Elo

No shared data

Throughput Speed

No shared data

Token Price Efficiency

Claude Sonnet 4.5

$35.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

—

EloHigh is better

1,524

Code Elo

High is better

—

Code EloHigh is better

1,531

LiveBench

High is better

—

LiveBenchHigh is better

67.4%

SWE-bench

High is better

—

SWE-benchHigh is better

70.1%

GPQA

High is better

—

GPQAHigh is better

80.2%

TTFT

Low is better

—

TTFTLow is better

240 ms

Speed

High is better

—

SpeedHigh is better

88 tok/s

In $

Low is better

$10.00 / 1M

In $Low is better

$3.00 / 1M+233%

Out $

Low is better

$50.00 / 1M

Out $Low is better

$15.00 / 1M+233%

Context

High is better

ContextHigh is better

Interactive Simulator (USD)

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save up to 70% with Claude Sonnet 4.5

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

Anthropic: Claude Fable Latest$1,100.00 / mo

In: $350Out: $750

Claude Sonnet 4.5$330.00 / mo

In: $105Out: $225

Estimated Cost Delta

Claude Sonnet 4.5 is estimated to save $770.00/month ($9,240/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Claude Sonnet 4.5:Pick Claude Sonnet 4.5 when you are optimizing output cost.
2
Anthropic: Claude Fable Latest:Pick Anthropic: Claude Fable Latest for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatClaude Sonnet 4.5

Lower output list price ($15/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGAnthropic: Claude Fable Latest

Larger window (1M).

Screenshots / visionClaude Sonnet 4.5

Claude Sonnet 4.5 is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	Claude Sonnet 4.5	Lower output list price ($15/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	Anthropic: Claude Fable Latest	Larger window (1M).
Screenshots / vision	Claude Sonnet 4.5	Claude Sonnet 4.5 is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news

launchFeb 18, 2026

Claude Sonnet 4.5 is the previous workhorse — still a valid vs baseline

Most of Opus 4.5 coding at a mid-tier price. Sonnet 5 replaced it as the buy; 4.5 remains a compare baseline.

Community Sentiment

Cast Your Matchup Vote

0 total votes

Community Discussions (0)

No comments posted on this matchup yet. Be the first to share an evaluation note!

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LIVE

~anthropic

Anthropic: Claude Fable Latest

Elo n/a

LiveBench—

SWE-bench—

Speed—

Output cost$50/1M

Anthropic

Claude Sonnet 4.5

Elo 1,524

LiveBench67.4%

SWE-bench70.1%

Speed88 tok/s

Output cost$15/1M

Frequently Asked Questions

Which is better overall, Anthropic: Claude Fable Latest or Claude Sonnet 4.5?: We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, Anthropic: Claude Fable Latest or Claude Sonnet 4.5?: SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?: Claude Sonnet 4.5 output tokens are $15/1M versus $50/1M. Input prices and retry rates still move the real bill.
Which is faster, Anthropic: Claude Fable Latest or Claude Sonnet 4.5?: We do not have TTFT for both models.
Which has the larger context window?: Anthropic: Claude Fable Latest accepts 1M tokens versus 1M.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Anthropic: Claude Fable Latest and Claude Sonnet 4.5 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Anthropic: Claude Fable Latest matchups →|All Claude Sonnet 4.5 matchups →

Claude Sonnet 4.5 vs Claude Sonnet 4 (previous sonnet)Claude Sonnet 4.5 vs Claude Sonnet 5 (next sonnet)Claude Opus 4.5 vs Claude Sonnet 4.5 Claude Opus 4.6 vs Claude Sonnet 4.5 Claude Opus 5 vs Claude Sonnet 4.5 Claude Fable 5 vs Claude Sonnet 4.5

Anthropic: Claude Fable Latest vs Claude Sonnet 4.5 benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Anthropic: Claude Fable Latest (0)vsClaude Sonnet 4.5 (9)

Anthropic: Claude Fable Latest: 0W (0%)Overall: Claude Sonnet 4.5Claude Sonnet 4.5: 9W (100%)

← Anthropic: Claude Fable Latest1 tiesClaude Sonnet 4.5 →

Claude Sonnet 4.5 (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

—vs1,524

Coding Elo

—vs1,531

SWE-bench

—vs70.1%

LiveBench

—vs67.4%

GPQA Diamond

—vs80.2%

Anthropic: Claude Fable Latest: 0WClaude Sonnet 4.5: 5W

Claude Sonnet 4.5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

—vs88 tok/s

Time to first token

—vs240 ms

Anthropic: Claude Fable Latest: 0WClaude Sonnet 4.5: 2W

Claude Sonnet 4.5 (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$50/1Mvs$15/1M

Input price

$10/1Mvs$3/1M

Context window

1Mvs1M

Anthropic: Claude Fable Latest: 0WClaude Sonnet 4.5: 2W

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatClaude Sonnet 4.5

Lower output list price ($15/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGAnthropic: Claude Fable Latest

Larger window (1M).

Screenshots / visionClaude Sonnet 4.5

Claude Sonnet 4.5 is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	Claude Sonnet 4.5	Lower output list price ($15/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	Anthropic: Claude Fable Latest	Larger window (1M).
Screenshots / vision	Claude Sonnet 4.5	Claude Sonnet 4.5 is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, Anthropic: Claude Fable Latest or Claude Sonnet 4.5?

We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.

Which is better at coding, Anthropic: Claude Fable Latest or Claude Sonnet 4.5?

SWE-bench is missing for at least one model, so we do not rank coding from a single number.

Which is cheaper to run in production?

Claude Sonnet 4.5 output tokens are $15/1M versus $50/1M. Input prices and retry rates still move the real bill.

Which is faster, Anthropic: Claude Fable Latest or Claude Sonnet 4.5?

We do not have TTFT for both models.

Which has the larger context window?

Anthropic: Claude Fable Latest accepts 1M tokens versus 1M.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Anthropic: Claude Fable Latest and Claude Sonnet 4.5 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

Claude Sonnet 4.5

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Claude Sonnet 4.5 is the previous workhorse — still a valid vs baseline

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Anthropic: Claude Fable Latest

Claude Sonnet 4.5

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

Claude Sonnet 4.5

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Claude Sonnet 4.5 is the previous workhorse — still a valid vs baseline

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Anthropic: Claude Fable Latest

Claude Sonnet 4.5

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons