Pairwise benchmark snapshot · Aug 16, 2026

Claude Fable 5 vs GPT-5.6 Sol benchmark

Name: Claude Fable 5 vs GPT-5.6 Sol AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Claude Fable 5 (Anthropic) and GPT-5.6 Sol (OpenAI) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Claude Fable 5 is ahead by 8 points (1,616 vs 1,608; seed-bootstrap (Aug 16, 2026)). On SWE-bench coding, Claude Fable 5 resolves 80% versus 77.6% (seed-bootstrap (Aug 16, 2026)). GPT-5.6 Sol streams faster (84 tok/s) while GPT-5.6 Sol is the cheaper output token ($30/1M). GPT-5.6 Sol has the larger context window (1.1M 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 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

OpenAI

GPT-5.6 Sol

OpenAI 5.6 flagship tier. Official API $5/$30 per 1M tokens (OpenAI pricing, Jul 30 2026 update left Sol unchanged).

Elo 1,608$30/1M 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 Fable 5 (5)vsGPT-5.6 Sol (5)

Claude Fable 5: 5W (50%)Overall: Even matchupGPT-5.6 Sol: 5W (50%)

← Claude Fable 5GPT-5.6 Sol →

Claude Fable 5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,616vs1,608

Coding Elo

1,622vs1,602

SWE-bench

80%vs77.6%

LiveBench

75.2%vs73.9%

GPQA Diamond

87.6%vs86.8%

Claude Fable 5: 5WGPT-5.6 Sol: 0W

GPT-5.6 Sol (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

58 tok/svs84 tok/s

Time to first token

340 msvs270 ms

Claude Fable 5: 0WGPT-5.6 Sol: 2W

GPT-5.6 Sol (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$50/1Mvs$30/1M

Input price

$10/1Mvs$5/1M

Context window

1Mvs1.1M

Claude Fable 5: 0WGPT-5.6 Sol: 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 AdvantageEven 3–3

Preference Elo

Claude Fable 5

8 pts advantage

Throughput Speed

GPT-5.6 Sol

26 tok/s faster

Price Efficiency

GPT-5.6 Sol

$20.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,616

EloHigh is better

1,608

Code Elo

High is better

+1%1,622

Code EloHigh is better

1,602

LiveBench

High is better

+2%75.2%

LiveBenchHigh is better

73.9%

SWE-bench

High is better

+3%80%

SWE-benchHigh is better

77.6%

GPQA

High is better

+1%87.6%

GPQAHigh is better

86.8%

TTFT

Low is better

340 ms

TTFTLow is better

270 ms+26%

Speed

High is better

58 tok/s

SpeedHigh is better

84 tok/s+45%

In $

Low is better

$10/1M

In $Low is better

$5/1M+100%

Out $

Low is better

$50/1M

Out $Low is better

$30/1M+67%

Context

High is better

ContextHigh is better

1.1M+5%

Interactive Simulator

Workload Cost & Savings Calculator

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

Save up to 43% with GPT-5.6 Sol

Monthly Volume50M tokens/mo

Quick Presets:

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

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

Claude Fable 5$1,100.00 / mo

In: $350.00Out: $750.00

GPT-5.6 Sol$625.00 / mo

In: $175.00Out: $450.00

Estimated Cost Delta

GPT-5.6 Sol is estimated to save $475.00/month ($5,700/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
GPT-5.6 Sol:Pick GPT-5.6 Sol when you are optimizing output cost.
3
GPT-5.6 Sol:Pick GPT-5.6 Sol when time-to-first-token matters more than peak Elo.

Recommended Workload Routing

Repo / coding agentsClaude Fable 5

Higher SWE-bench (80%).

High-volume chatGPT-5.6 Sol

Lower output list price ($30/1M).

Voice / low-latency UIGPT-5.6 Sol

Lower TTFT (270 ms).

Long-document RAGGPT-5.6 Sol

Larger window (1.1M).

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	GPT-5.6 Sol	Lower output list price ($30/1M).
Voice / low-latency UI	GPT-5.6 Sol	Lower TTFT (270 ms).
Long-document RAG	GPT-5.6 Sol	Larger window (1.1M).
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

compareAug 12, 2026

Grok vs ChatGPT: price and Elo, not a personality contest

Brand hub remaps to top xAI vs top OpenAI. After Aug 12 that is Grok 4.6 vs Sol.

compareJul 24, 2026

Claude vs GPT benchmark: this hub always remaps to the current Elo leaders

Not a frozen 2025 article. Today that is usually Opus 5 vs GPT-5.6 Sol. Dated cells, not a brand fight.

compareJul 16, 2026

Gemini vs GPT: long context versus the OpenAI flagship invoice

Hub remaps to top Google vs top OpenAI Elo. Usually 3.6 Pro vs Sol. Window vs price is the plot.

launchJul 9, 2026

GPT-5.6 Sol: OpenAI’s $5/$30 flagship tier on this leaderboard

Jul 9 2026 family; Jul 30 price update left Sol unchanged. This is the GPT side of Claude vs GPT.

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LIVE

Anthropic

Claude Fable 5

Elo 1,616

LiveBench75.2%

SWE-bench80%

Speed58 tok/s

Output cost$50/1M

OpenAI

GPT-5.6 Sol

Elo 1,608

LiveBench73.9%

SWE-bench77.6%

Speed84 tok/s

Output cost$30/1M

Frequently Asked Questions

Which is better overall, Claude Fable 5 or GPT-5.6 Sol?: 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 Fable 5 or GPT-5.6 Sol?: Claude Fable 5 leads SWE-bench at 80% vs 77.6%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: GPT-5.6 Sol output tokens are $30/1M versus $50/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Fable 5 or GPT-5.6 Sol?: GPT-5.6 Sol has the lower time-to-first-token (270 ms vs 340 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: GPT-5.6 Sol accepts 1.1M 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. Claude Fable 5 and GPT-5.6 Sol Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Claude Fable 5 matchups →|All GPT-5.6 Sol matchups →

GPT-5.6 Sol vs GPT-5 (previous gpt-flagship)Claude Opus 5 vs Claude Fable 5 Claude Opus 4.8 vs GPT-5.6 Sol Claude Opus 4.6 vs GPT-5.6 Sol Claude Opus 4.5 vs GPT-5.6 Sol Claude Sonnet 5 vs GPT-5.6 Sol

Claude Fable 5 vs GPT-5.6 Sol benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Fable 5 (5)vsGPT-5.6 Sol (5)

Claude Fable 5: 5W (50%)Overall: Even matchupGPT-5.6 Sol: 5W (50%)

← Claude Fable 5GPT-5.6 Sol →

Claude Fable 5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,616vs1,608

Coding Elo

1,622vs1,602

SWE-bench

80%vs77.6%

LiveBench

75.2%vs73.9%

GPQA Diamond

87.6%vs86.8%

Claude Fable 5: 5WGPT-5.6 Sol: 0W

GPT-5.6 Sol (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

58 tok/svs84 tok/s

Time to first token

340 msvs270 ms

Claude Fable 5: 0WGPT-5.6 Sol: 2W

GPT-5.6 Sol (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$50/1Mvs$30/1M

Input price

$10/1Mvs$5/1M

Context window

1Mvs1.1M

Claude Fable 5: 0WGPT-5.6 Sol: 3W

Recommended Workload Routing

Repo / coding agentsClaude Fable 5

Higher SWE-bench (80%).

High-volume chatGPT-5.6 Sol

Lower output list price ($30/1M).

Voice / low-latency UIGPT-5.6 Sol

Lower TTFT (270 ms).

Long-document RAGGPT-5.6 Sol

Larger window (1.1M).

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	GPT-5.6 Sol	Lower output list price ($30/1M).
Voice / low-latency UI	GPT-5.6 Sol	Lower TTFT (270 ms).
Long-document RAG	GPT-5.6 Sol	Larger window (1.1M).
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 Fable 5 or GPT-5.6 Sol?

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 Fable 5 or GPT-5.6 Sol?

Claude Fable 5 leads SWE-bench at 80% vs 77.6%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

GPT-5.6 Sol output tokens are $30/1M versus $50/1M. Input prices and retry rates still move the real bill.

Which is faster, Claude Fable 5 or GPT-5.6 Sol?

GPT-5.6 Sol has the lower time-to-first-token (270 ms vs 340 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

GPT-5.6 Sol accepts 1.1M 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. Claude Fable 5 and GPT-5.6 Sol 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

GPT-5.6 Sol

GPT-5.6 Sol

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Grok vs ChatGPT: price and Elo, not a personality contest

Claude vs GPT benchmark: this hub always remaps to the current Elo leaders

Gemini vs GPT: long context versus the OpenAI flagship invoice

GPT-5.6 Sol: OpenAI’s $5/$30 flagship tier on this leaderboard

Cast Your Matchup Vote

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Claude Fable 5

GPT-5.6 Sol

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

GPT-5.6 Sol

GPT-5.6 Sol

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Grok vs ChatGPT: price and Elo, not a personality contest

Claude vs GPT benchmark: this hub always remaps to the current Elo leaders

Gemini vs GPT: long context versus the OpenAI flagship invoice

GPT-5.6 Sol: OpenAI’s $5/$30 flagship tier on this leaderboard

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Claude Fable 5

GPT-5.6 Sol

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons