Model vs model

Claude Fable 5 vs Agnes 2.5 Pro Alpha

A debate-ready pair page: current winner, strongest alternative, decisive benchmarks, and the warning that should travel with the claim.

Use case · Everyday chatbot
Winner · Claude Fable 5
Sources · All public sources

Winner

Claude Fable 5

Anthropic

17benchmarks won

Coding

Versus · Everyday chatbot

Claude Fable 5 leads this compare set for everyday chatbot.

Claude Fable 517 of 17 wins

Verified and stable

0 shared benchmarks are still too close to call, so the win stays conditional. This compare uses all public sources, with provider-official evidence labeled separately.

Close calls: 0
Sources: All public

Full compare workspace Disagreement page

100%win share

Challenger

Agnes 2.5 Pro Alpha

Unknown

0benchmarks won

Reasoning / math / science

The cases in full

Claude Fable 5 case

Coding

Agnes 2.5 Pro Alpha case

Reasoning / math / science

What changes the outcome

Claude Fable 5: 89 visible benchmark gaps still leave room for the result to move.
Agnes 2.5 Pro Alpha: 121 visible benchmark gaps still leave room for the result to move.

Why this result is surprising

The visible shared evidence is more decisive than usual for this compare set.
Very few shared benchmarks are decisively separating these models.

Why this is not a clean win

0 shared benchmarks are still too close to call, so the win stays conditional. This compare uses all public sources, with provider-official evidence labeled separately.
Agnes 2.5 Pro Alpha remains the strongest alternative once you change use case, mode, or missing-evidence assumptions.

Open full compare workspace Open evidence page Open disagreement page

Decisive benchmarks

17 of 138 benchmarks


Intelligence Index AA · index Text · Chat / text	6299.6% exact aliasverified runtime Row details Raw value 62 Percentile 99.6% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	40n/a exact aliasverified runtimeContext only Row details Raw value 40 Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
Time to first token AA · s Text · Chat / text	151.92s1.3% exact aliasverified runtime Row details Raw value 151.92s Percentile 1.3% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	2.09sn/a exact aliasverified runtimeContext only Row details Raw value 2.09s Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
Coding Index AA · index Code · Coding	7697.9% exact aliasverified runtime Row details Raw value 76 Percentile 97.9% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	59n/a exact aliasverified runtimeContext only Row details Raw value 59 Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
Agentic Index AA · index Code · Coding	5795.5% exact aliasverified runtime Row details Raw value 57 Percentile 95.5% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	25n/a exact aliasverified runtimeContext only Row details Raw value 25 Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
Output Speed AA · tokens/s Text · Chat / text	67.1 tokens/s37.5% exact aliasverified runtime Row details Raw value 67.1 tokens/s Percentile 37.5% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	132 tokens/sn/a exact aliasverified runtimeContext only Row details Raw value 132 tokens/s Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
Time to first answer token AA · s Text · Chat / text	151.92s1.3% exact aliasverified runtime Row details Raw value 151.92s Percentile 1.3% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	17.24sn/a exact aliasverified runtimeContext only Row details Raw value 17.24s Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
Blended price AA · /1M tokens Text · Chat / text	$20 /1M tokens3.3% exact aliasverified runtime Row details Raw value $20 /1M tokens Percentile 3.3% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	$0.6 /1M tokensn/a exact aliasverified runtimeContext only Row details Raw value $0.6 /1M tokens Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
Input price AA · /1M input tokens Text · Chat / text	$10 /1M input tokens3.7% exact aliasverified runtime Row details Raw value $10 /1M input tokens Percentile 3.7% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	$0.5 /1M input tokensn/a exact aliasverified runtimeContext only Row details Raw value $0.5 /1M input tokens Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
Output price AA · /1M output tokens Text · Chat / text	$50 /1M output tokens3.3% exact aliasverified runtime Row details Raw value $50 /1M output tokens Percentile 3.3% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	$0.9 /1M output tokensn/a exact aliasverified runtimeContext only Row details Raw value $0.9 /1M output tokens Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
GPQA AA · % Text · Reasoning / math / science	92.6%97.3% exact aliasverified runtime Row details Raw value 92.6% Percentile 97.3% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	87.6%n/a exact aliasverified runtimeContext only Row details Raw value 87.6% Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
Humanity's Last Exam AA · % Text · Reasoning / math / science	55.5%100% exact aliasverified runtime Row details Raw value 55.5% Percentile 100% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	33.6%n/a exact aliasverified runtimeContext only Row details Raw value 33.6% Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a
CritPt AA · % Text · Reasoning / math / science	28.6%99.2% exact aliasverified runtime Row details Raw value 28.6% Percentile 99.2% Last updated recent Eligibility headline eligible Identity provider alias (0.94) Source label Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) Source row	10.9%n/a exact aliasverified runtimeContext only Row details Raw value 10.9% Percentile n/a Last updated recent Eligibility preview_model Identity provider alias (0.94) Source label Agnes 2.5 Pro Alpha Source row	n/a

1-12 of 17

Page 1 of 2Page size

Intelligence Index

AA · index

Text · Chat / text

6299.6%

exact aliasverified runtime

Row details

Raw value: 62
Percentile: 99.6%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

40n/a

exact aliasverified runtimeContext only

Row details

Raw value: 40
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

Time to first token

AA · s

Text · Chat / text

151.92s1.3%

exact aliasverified runtime

Row details

Raw value: 151.92s
Percentile: 1.3%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

2.09sn/a

exact aliasverified runtimeContext only

Row details

Raw value: 2.09s
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

Coding Index

AA · index

Code · Coding

7697.9%

exact aliasverified runtime

Row details

Raw value: 76
Percentile: 97.9%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

59n/a

exact aliasverified runtimeContext only

Row details

Raw value: 59
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

Agentic Index

AA · index

Code · Coding

5795.5%

exact aliasverified runtime

Row details

Raw value: 57
Percentile: 95.5%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

25n/a

exact aliasverified runtimeContext only

Row details

Raw value: 25
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

Output Speed

AA · tokens/s

Text · Chat / text

67.1 tokens/s37.5%

exact aliasverified runtime

Row details

Raw value: 67.1 tokens/s
Percentile: 37.5%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

132 tokens/sn/a

exact aliasverified runtimeContext only

Row details

Raw value: 132 tokens/s
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

Time to first answer token

AA · s

Text · Chat / text

151.92s1.3%

exact aliasverified runtime

Row details

Raw value: 151.92s
Percentile: 1.3%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

17.24sn/a

exact aliasverified runtimeContext only

Row details

Raw value: 17.24s
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

Blended price

AA · /1M tokens

Text · Chat / text

$20 /1M tokens3.3%

exact aliasverified runtime

Row details

Raw value: $20 /1M tokens
Percentile: 3.3%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

$0.6 /1M tokensn/a

exact aliasverified runtimeContext only

Row details

Raw value: $0.6 /1M tokens
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

Input price

AA · /1M input tokens

Text · Chat / text

$10 /1M input tokens3.7%

exact aliasverified runtime

Row details

Raw value: $10 /1M input tokens
Percentile: 3.7%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

$0.5 /1M input tokensn/a

exact aliasverified runtimeContext only

Row details

Raw value: $0.5 /1M input tokens
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

Output price

AA · /1M output tokens

Text · Chat / text

$50 /1M output tokens3.3%

exact aliasverified runtime

Row details

Raw value: $50 /1M output tokens
Percentile: 3.3%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

$0.9 /1M output tokensn/a

exact aliasverified runtimeContext only

Row details

Raw value: $0.9 /1M output tokens
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

GPQA

AA · %

Text · Reasoning / math / science

92.6%97.3%

exact aliasverified runtime

Row details

Raw value: 92.6%
Percentile: 97.3%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

87.6%n/a

exact aliasverified runtimeContext only

Row details

Raw value: 87.6%
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

Humanity's Last Exam

AA · %

Text · Reasoning / math / science

55.5%100%

exact aliasverified runtime

Row details

Raw value: 55.5%
Percentile: 100%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

33.6%n/a

exact aliasverified runtimeContext only

Row details

Raw value: 33.6%
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

CritPt

AA · %

Text · Reasoning / math / science

28.6%99.2%

exact aliasverified runtime

Row details

Raw value: 28.6%
Percentile: 99.2%
Last updated: recent
Eligibility: headline eligible
Identity: provider alias (0.94)
Source label: Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

Source row

10.9%n/a

exact aliasverified runtimeContext only

Row details

Raw value: 10.9%
Percentile: n/a
Last updated: recent
Eligibility: preview_model
Identity: provider alias (0.94)
Source label: Agnes 2.5 Pro Alpha

Source row

n/a

Claude Fable 5 vs Agnes 2.5 Pro Alpha

Claude Fable 5

Claude Fable 5 leads this compare set for everyday chatbot.

Agnes 2.5 Pro Alpha

Claude Fable 5 case

Agnes 2.5 Pro Alpha case

What changes the outcome

Why this result is surprising

Why this is not a clean win

Share the recommendation with the source data attached.

Open or copy the stable surfaces

Use the exact public framing

Pick the voice before you post

Compose a post that keeps the warning attached

Decisive benchmarks

Loading model comparison.

Claude Fable 5 vs Agnes 2.5 Pro Alpha

Claude Fable 5

Claude Fable 5 leads this compare set for everyday chatbot.

Agnes 2.5 Pro Alpha

Claude Fable 5 case

Agnes 2.5 Pro Alpha case

What changes the outcome

Why this result is surprising

Why this is not a clean win

Share the recommendation with the source data attached.

Open or copy the stable surfaces

Use the exact public framing

Pick the voice before you post

Compose a post that keeps the warning attached

Decisive benchmarks