Pairwise benchmark snapshot · Aug 16, 2026

Claude 3 Opus vs Claude Fable 5 benchmark

Name: Claude 3 Opus vs Claude Fable 5 AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Claude 3 Opus (Anthropic) and Claude Fable 5 (Anthropic) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Claude Fable 5 is ahead by 368 points (1,616 vs 1,248; seed-bootstrap (Aug 16, 2026)). On SWE-bench coding, Claude Fable 5 resolves 80% versus 38.4% (seed-bootstrap (Aug 16, 2026)). Claude Fable 5 streams faster (58 tok/s) while Claude Fable 5 is the cheaper output token ($50/1M). Claude Fable 5 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

Claude 3 Opus

Original Claude 3 flagship. Kept so opus 3 vs later Opus and vs GPT-4o still resolve.

Elo 1,248$75/1M out

Anthropic

Claude Fable 5

Anthropic top-tier long-horizon model. Official API $10/$50 per 1M tokens (Claude Platform pricing, Aug 2026).

Elo 1,616$50/1M out

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Model A

Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude 3 Opus (0)vsClaude Fable 5 (10)

Claude 3 Opus: 0W (0%)Overall: Claude Fable 5Claude Fable 5: 10W (100%)

← Claude 3 OpusClaude Fable 5 →

Claude Fable 5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,248vs1,616

Coding Elo

—vs1,622

SWE-bench

38.4%vs80%

LiveBench

46.2%vs75.2%

GPQA Diamond

50.4%vs87.6%

Claude 3 Opus: 0WClaude Fable 5: 5W

Claude Fable 5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

48 tok/svs58 tok/s

Time to first token

420 msvs340 ms

Claude 3 Opus: 0WClaude Fable 5: 2W

Claude Fable 5 (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$75/1Mvs$50/1M

Input price

$15/1Mvs$10/1M

Context window

200kvs1M

Claude 3 Opus: 0WClaude Fable 5: 3W

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 Fable 5 6/6

Preference Elo

Claude Fable 5

368 pts advantage

Throughput Speed

Claude Fable 5

10 tok/s faster

Price Efficiency

Claude Fable 5

$25.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,248

EloHigh is better

1,616+29%

Code Elo

High is better

—

Code EloHigh is better

1,622

LiveBench

High is better

46.2%

LiveBenchHigh is better

75.2%+63%

SWE-bench

High is better

38.4%

SWE-benchHigh is better

80%+108%

GPQA

High is better

50.4%

GPQAHigh is better

87.6%+74%

TTFT

Low is better

420 ms

TTFTLow is better

340 ms+24%

Speed

High is better

48 tok/s

SpeedHigh is better

58 tok/s+21%

In $

Low is better

$15/1M

In $Low is better

$10/1M+50%

Out $

Low is better

$75/1M

Out $Low is better

$50/1M+50%

Context

High is better

200k

ContextHigh is better

1M+400%

Interactive Simulator

Workload Cost & Savings Calculator

Simulate monthly production API costs based on published $/1M tokens.

Save up to 33% with Claude Fable 5

Monthly Volume50M tokens/mo

Quick Presets:

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

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

Claude 3 Opus$1,650.00 / mo

In: $525.00Out: $1125.00

Claude Fable 5$1,100.00 / mo

In: $350.00Out: $750.00

Estimated Cost Delta

Claude Fable 5 is estimated to save $550.00/month ($6,600/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Claude Fable 5:Pick Claude Fable 5 when repo-level coding accuracy is the constraint.
2
Claude Fable 5:Pick Claude Fable 5 when time-to-first-token matters more than peak Elo.
3
Claude Fable 5:Pick Claude Fable 5 for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsClaude Fable 5

Higher SWE-bench (80%).

High-volume chatClaude Fable 5

Lower output list price ($50/1M).

Voice / low-latency UIClaude Fable 5

Lower TTFT (340 ms).

Long-document RAGClaude Fable 5

Larger window (1M).

Screenshots / visionClaude Fable 5

Both accept images. Defaulting to the higher-Elo side (Claude Fable 5).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Fable 5	Higher SWE-bench (80%).
High-volume chat	Claude Fable 5	Lower output list price ($50/1M).
Voice / low-latency UI	Claude Fable 5	Lower TTFT (340 ms).
Long-document RAG	Claude Fable 5	Larger window (1M).
Screenshots / vision	Claude Fable 5	Both accept images. Defaulting to the higher-Elo side (Claude Fable 5).

Related Editorial Dispatches & Benchmark Notes

View all news

launchJun 15, 2026

Claude Fable 5: the $10/$50 long-horizon Anthropic SKU

Fable 5 is not Sonnet with extra adjectives. It is the expensive long-horizon row. Read SWE-bench and output price together.

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LIVE

Anthropic

Claude 3 Opus

Elo 1,248

LiveBench46.2%

SWE-bench38.4%

Speed48 tok/s

Output cost$75/1M

Anthropic

Claude Fable 5

Elo 1,616

LiveBench75.2%

SWE-bench80%

Speed58 tok/s

Output cost$50/1M

Frequently Asked Questions

Which is better overall, Claude 3 Opus or Claude Fable 5?: Claude Fable 5 has the higher preference Elo in our latest snapshot (1,616). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude 3 Opus or Claude Fable 5?: Claude Fable 5 leads SWE-bench at 80% vs 38.4%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: Claude Fable 5 output tokens are $50/1M versus $75/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude 3 Opus or Claude Fable 5?: Claude Fable 5 has the lower time-to-first-token (340 ms vs 420 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: Claude Fable 5 accepts 1M tokens versus 200k.
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. Claude 3 Opus and Claude Fable 5 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Claude 3 Opus matchups →|All Claude Fable 5 matchups →

Claude 3 Opus vs Claude Opus 4 (next opus)Claude Opus 4.5 vs Claude Fable 5 Claude Opus 4.6 vs Claude Fable 5 Claude Sonnet 4.5 vs Claude Fable 5 Claude Opus 5 vs Claude Fable 5 Claude Opus 4.8 vs Claude Fable 5

Claude 3 Opus vs Claude Fable 5 benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude 3 Opus (0)vsClaude Fable 5 (10)

Claude 3 Opus: 0W (0%)Overall: Claude Fable 5Claude Fable 5: 10W (100%)

← Claude 3 OpusClaude Fable 5 →

Claude Fable 5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,248vs1,616

Coding Elo

—vs1,622

SWE-bench

38.4%vs80%

LiveBench

46.2%vs75.2%

GPQA Diamond

50.4%vs87.6%

Claude 3 Opus: 0WClaude Fable 5: 5W

Claude Fable 5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

48 tok/svs58 tok/s

Time to first token

420 msvs340 ms

Claude 3 Opus: 0WClaude Fable 5: 2W

Claude Fable 5 (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$75/1Mvs$50/1M

Input price

$15/1Mvs$10/1M

Context window

200kvs1M

Claude 3 Opus: 0WClaude Fable 5: 3W

Recommended Workload Routing

Repo / coding agentsClaude Fable 5

Higher SWE-bench (80%).

High-volume chatClaude Fable 5

Lower output list price ($50/1M).

Voice / low-latency UIClaude Fable 5

Lower TTFT (340 ms).

Long-document RAGClaude Fable 5

Larger window (1M).

Screenshots / visionClaude Fable 5

Both accept images. Defaulting to the higher-Elo side (Claude Fable 5).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Fable 5	Higher SWE-bench (80%).
High-volume chat	Claude Fable 5	Lower output list price ($50/1M).
Voice / low-latency UI	Claude Fable 5	Lower TTFT (340 ms).
Long-document RAG	Claude Fable 5	Larger window (1M).
Screenshots / vision	Claude Fable 5	Both accept images. Defaulting to the higher-Elo side (Claude Fable 5).

Frequently Asked Questions

Which is better overall, Claude 3 Opus or Claude Fable 5?

Claude Fable 5 has the higher preference Elo in our latest snapshot (1,616). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Claude 3 Opus or Claude Fable 5?

Claude Fable 5 leads SWE-bench at 80% vs 38.4%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

Claude Fable 5 output tokens are $50/1M versus $75/1M. Input prices and retry rates still move the real bill.

Which is faster, Claude 3 Opus or Claude Fable 5?

Claude Fable 5 has the lower time-to-first-token (340 ms vs 420 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

Claude Fable 5 accepts 1M tokens versus 200k.

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. Claude 3 Opus and Claude Fable 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

Claude Fable 5

Claude Fable 5

Claude Fable 5

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Claude Fable 5: the $10/$50 long-horizon Anthropic SKU

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Community Discussions (0)

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CompareLLM Matrix

Claude 3 Opus

Claude Fable 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

Claude Fable 5

Claude Fable 5

Claude Fable 5

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Claude Fable 5: the $10/$50 long-horizon Anthropic SKU

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Claude 3 Opus

Claude Fable 5

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons