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AnthropicLLM matchup

Claude Opus 5.5vs.Claude Fable 5

Is the higher price worth it?

Claude Opus 5.5 performs better than Claude Fable 5 and is cheaper: Claude Fable 5 costs 2.5 times as much.

Opus 5.5 ahead
IntelligenceOverall index, 100 points = average
126.1

Claude Opus 5.5

Rank 1

112.5

Claude Fable 5

Rank 12

Opus 5.5 faster
SpeedTokens per second
106

Claude Opus 5.5

86

Claude Fable 5

Opus 5.5 cheaper
Price$ per 1M tokens
$8

Claude Opus 5.5

$20

Claude Fable 5

Opus 5.5 more popular
Popularity0 to 100
68

Claude Opus 5.5

Rank 8 of 785

44

Claude Fable 5

Rank 208 of 785

Choose Claude Opus 5.5 for

GeneralReasoningKnowledgeCodingMathematicsFinanceProductivityLegal (not certain)Multimodal (not certain)Agents (not certain)Health (not certain)

Choose Claude Fable 5 for

No clear advantage

Where is the difference?

Strengths at a glance

Opus 5.5Fable 5Median of all ranked models

11513595CodingOpus 5.5ReasoningOpus 5.5MathematicsOpus 5.5KnowledgeOpus 5.5Agentsslightly Opus5.5GeneralOpus 5.5Multimodalslightly Opus5.5FinanceOpus 5.5Legalslightly Opus5.5Healthslightly Opus5.5
CodingOpus 5.5 ahead
Opus 5.5129.9Rank 1
Fable 5112.6Rank 14
Median of ranked models84.1

95 % range: Opus 5.5 121.2 to 138.7, Fable 5 109.4 to 115.8.

AreaOpus 5.5Fable 5

The same values and verdicts as the bars below. In the close-up the net starts at 95 points, just below the weaker model's lowest value; the reference group average is 100.

Opus 5.5 is ahead in 6 of 10 areas, Fable 5 in none.

Opus 5.5 ahead: 6Opus 5.5 slightly ahead: 4

Areas in the overall index
GeneralOpus 5.5 +21125.1 to 103.9
ReasoningOpus 5.5 +18122.5 to 104.4
KnowledgeOpus 5.5 +18131.4 to 113.5
CodingOpus 5.5 +17129.9 to 112.6
MathematicsOpus 5.5 +14131.8 to 117.5
Multimodalleaning Opus 5.5not certain · 2 tests each
Agentsleaning Opus 5.5not certain · 5 and 2 tests
Specialist fields
FinanceOpus 5.5 +10121.4 to 111.8
Legalleaning Opus 5.5not certain · 3 tests each
Healthleaning Opus 5.5not certain · 2 tests each

Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.

Show 4 more areas that do not count toward the overall index
ProductivityOpus 5.5 +9125.0 to 115.9
Searchtoo little data119.5 to 114.5
Cybersecurityonly Opus 5.5 has a score
Educationonly Opus 5.5 has a score

Bar length shows the gap in index points (full width 15 points, one standard deviation of the reference group). Solid means clearly ahead, hatched not certain yet, a thin grey bar level.

Which model for which task?

Everyday tasks, translated from the area values above. Each row names the values it rests on.

Writing and debugging codeOpus 5.5Coding 129.9 to 112.6
Maths and data analysisOpus 5.5Mathematics 131.8 to 117.5, Reasoning 122.5 to 104.4
Facts and researchOpus 5.5Knowledge 131.4 to 113.5, Search 119.5 to 114.5 (too little data)
Agents and workflowsleaning Opus 5.5Agents 117.2 to 111.0
Fast chat repliesOpus 5.5106 to 86 tokens per second
Security analysisopenCybersecurity without a score for Fable 5
Many requests on a small budgetOpus 5.5$8 to $20 per 1M tokens
Finance, legal and medical textsOpus 5.5Finance 121.4 to 111.8, Legal 121.5 to 110.9, Health 122.1 to 116.0
Images, screenshots and PDFsleaning Opus 5.5Multimodal 123.1 to 116.4

See for yourself: same task, one attempt

The same prompt for both models. We show the latest attempt without fixes; it does not count toward the overall index.

Pelican on a bicycle

Prompt

Generate an SVG of a pelican riding a bicycle

Task origin: Simon Willison

Claude Opus 5.5

Claude Opus 5.5: Pelican on a bicycle
A community classic for free-form SVG drawing.

Oct 1, 2026 · 33 s · $0.07

Test details
Run date
Oct 1, 2026
API provider
openrouter
Requested API model
anthropic/claude-opus-5.5
Reasoning setting
high
Token limit including reasoning
8,192 tokens
Output tokens
3,536 tokens
Cost of the attempt
$0.0708
Response time
33.2 s
API model reported in response
anthropic/claude-opus-5.5
Pinned endpoint
Anthropic | anthropic/claude-opus-5.5-20260921
Temperature
Provider default
Test protocol
community-visual-tests-v1
Technical checks
Passed, not a quality rating

Visually reviewed. This individual test does not establish overall model quality.

Claude Fable 5

Claude Fable 5: Pelican on a bicycle
A community classic for free-form SVG drawing.

Sep 7, 2026 · 53 s · $0.11

Test details
Run date
Sep 7, 2026
API provider
openrouter
Requested API model
anthropic/claude-fable-5
Reasoning setting
high
Token limit including reasoning
8,192 tokens
Output tokens
2,287 tokens
Cost of the attempt
$0.1146
Response time
53.1 s
API model reported in response
anthropic/claude-fable-5
Pinned endpoint
Anthropic | anthropic/claude-5-fable-20260609
Temperature
Provider default
Test protocol
community-visual-tests-v1
Technical checks
Passed, not a quality rating

Visually reviewed. This individual test does not establish overall model quality.

SVG short test

SVG short test

One SVG task with the same fixed settings for every model, without hidden thinking.

Prompt

Return only one standalone SVG of a pelican riding a bicycle. Use viewBox="0 0 800 600", simple shapes, two clearly visible wheels and a recognizable pelican with a long beak. At most 30 SVG elements and 1800 characters. No Markdown, explanations, comments, scripts, animation, CSS or external resources.

Claude Opus 5.5

Unavailable in this round

Claude Fable 5

Unavailable in this round

Claude Opus 5.5 and Claude Fable 5 in the overall index

Every model with a place in the overall index, both models of this matchup highlighted. You can add or hide other models.

Overall index (Gradually Meta-Score v4)

20 of 92 models

4 models in this view are measured at a lower reasoning effort than max in the overall index. Dashed column: lower reasoning effort than the top.

Claude Opus 5.5max126.1
Gemini 4 Carbonhigh125.8
Claude Fable 5.1max123.8
Claude Sonnet 5.5max122.8
Gemini 4 Argonhigh122.3
GPT-6 Astramax121.3
GPT-6.1 Solmax119.2
Muse Wonder Fullmax118.3
Claude Opus 5max117.2
Muse Wondermax113.4
Kimi K3.1 Promax112.9
Claude Fable 5max112.5
GPT-6 Solmax110.5
GPT-5.6 Solmax108.7
Muse Spark 1.3max107.4
Gemini 3.7 Flashhigh107.1
DeepSeek V4.1 Flash 1017max106.6
Gemini 3.8 Flashhigh106.5
GPT-6.1 Terramax105.3
Claude Haiku 5.5max103.4

Popularity compared

How often the models are searched for, used and mentioned, on a scale from 0 to 100.

Claude Opus 5.5 is more popular than Claude Fable 5: 68 to 44 out of 100.

Over time

Weekly values from October 18, 2026 to November 7, 2026

Claude Opus 5.5Claude Fable 5

All data side by side

The better value is bold. For the overall index only when the gap is clear.

MetricClaude Opus 5.5Claude Fable 5
Intelligence
Overall indexpoints, 100 = reference group average, higher is better126.1112.5
RankRank 1 of 92Rank 12 of 92
Price per 1M tokens
Inputwhat you send$4$10
Outputwhat the model writes$20$50
Cost per task (own tests)average of 3 original-protocol tasks both models passed (SVG short test not included)$0.11$0.13
Speed
Tokens per second10686
Popularity
Popularitysearch, usage and mentions, 0 to 10068Rank 8 of 78544Rank 208 of 785
Technical
Context windowhow much text the model reads at once1 M tokens≈ 1,500 A4 pages1 M tokens≈ 1,500 A4 pages
Knowledge cutoffJune 2026January 2026
ReleasedSep 22, 2026Jun 9, 2026
AvailabilityActiveActive
Open weightsnono

Prices without caching or batch discounts · Page count as a rule of thumb from Artificial Analysis

Is there a better choice?

Successor of Fable 5Claude Fable 5.1

Overall index 123.8, rank 3$10 input and $50 output per 1M tokens

Opus 5.5 vs. Claude Fable 5.1
Cheaper than Opus 5.5Claude Sonnet 5.5

Overall index 122.8, rank 4$2 input and $10 output per 1M tokens

Opus 5.5 vs. Claude Sonnet 5.5

Shared benchmarks

Single results from the same benchmark version, task and metric. A value is bold only with the same test setup and a clear gap.

A: Claude Opus 5.5B: Claude Fable 5

Code MigrationOverall · higher is betterClaude Opus 5.5: 66.6%Claude Fable 5: 55.1%Vals AIAs of 10/29/2026
EMBOverall · higher is betterClaude Opus 5.5: 75.9%Claude Fable 5: 73.7%Vals AIAs of 10/20/2026
Finance Agent (v2)Overall · higher is betterClaude Opus 5.5: 58.6%Claude Fable 5: 56.3%Vals AIAs of 10/29/2026
Legal Research BenchOverall · All-pass · higher is betterClaude Opus 5.5: 50.5%Claude Fable 5: 49.5%Vals AIAs of 11/05/2026
LMArena Code Arena WebDevOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 1,810Claude Fable 5: 1,624LMArenaAs of 10/28/2026
LMArena SearchOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 1,213Claude Fable 5: 1,229LMArenaAs of 10/13/2026
LMArena Text, Style ControlOverall · higher is betterClaude Opus 5.5: 1,509Claude Fable 5: 1,504LMArenaAs of 10/28/2026
LMArena Vision, Style ControlOverall · higher is betterClaude Opus 5.5: 1,293Claude Fable 5: 1,309LMArenaAs of 10/19/2026
MedCodeOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 49.8%Claude Fable 5: 56.1%Vals AIAs of 10/29/2026
MedScribeOverall · higher is betterTest setup not documented as identicalClaude Opus 5.5: 91.4%Claude Fable 5: 88.5%Vals AIAs of 10/29/2026
Show 54 more benchmarks
ProgramBenchOverall · higher is betterClaude Opus 5.5: 18.5%Claude Fable 5: 2.0%Vals AIAs of 11/05/2026
ProofBench v1.1Overall · higher is betterClaude Opus 5.5: 100%Claude Fable 5: 95%Vals AIAs of 10/29/2026
Public Benefits Bench v1.1Overall · higher is betterClaude Opus 5.5: 70.6%Claude Fable 5: 70.4%Vals AIAs of 10/12/2026
Tax Agent BenchOverall · higher is betterClaude Opus 5.5: 45.6%Claude Fable 5: 38.3%Vals AIAs of 11/05/2026
Terminal-Bench 4.0Overall · higher is betterClaude Opus 5.5: 65.2%Claude Fable 5: 41.4%Vals AIAs of 11/05/2026
Terminal-Bench 4.0Overall · higher is betterClaude Opus 5.5: 64.9%Claude Fable 5: 44.6%Terminal-BenchAs of 10/06/2026
Terminal-Bench-ScienceOverall · higher is betterClaude Opus 5.5: 47.1%Claude Fable 5: 15.7%Vals AIAs of 11/05/2026
Vibe Code Bench v1.1Overall · higher is betterClaude Opus 5.5: 90.3%Claude Fable 5: 90.4%Vals AIAs of 11/05/2026
Code MigrationCLI · higher is betterClaude Opus 5.5: 65.5%Claude Fable 5: 60.1%Vals AIAs of 10/29/2026
EMBComps · higher is betterClaude Opus 5.5: 76.4%Claude Fable 5: 70.8%Vals AIAs of 10/20/2026
Finance Agent (v2)Adjustments · higher is betterClaude Opus 5.5: 54.5%Claude Fable 5: 51.1%Vals AIAs of 10/29/2026
Legal Research BenchAdministrative / Regulatory · All-pass · higher is betterClaude Opus 5.5: 65.2%Claude Fable 5: 57.6%Vals AIAs of 11/05/2026
LMArena Code Arena WebDevHTML development · higher is betterTest setup not documented as identicalClaude Opus 5.5: 1,753Claude Fable 5: 1,651LMArenaAs of 10/28/2026
LMArena Text, Style ControlBusiness, management and finance · higher is betterClaude Opus 5.5: 1,495Claude Fable 5: 1,501LMArenaAs of 10/28/2026
LMArena Vision, Style ControlCreative writing with images · higher is betterClaude Opus 5.5: 1,287Claude Fable 5: 1,319LMArenaAs of 10/19/2026
ProgramBenchAlmost Resolved · higher is betterClaude Opus 5.5: 65%Claude Fable 5: 33%Vals AIAs of 11/05/2026
Tax Agent BenchControversy & Precedence Analysis · higher is betterClaude Opus 5.5: 30.0%Claude Fable 5: 13.3%Vals AIAs of 11/05/2026
Terminal-Bench 4.0Hardware · higher is betterClaude Opus 5.5: 60%Claude Fable 5: 40%Vals AIAs of 11/05/2026
Terminal-Bench-ScienceEarth Sciences · higher is betterClaude Opus 5.5: 37.5%Claude Fable 5: 25.0%Vals AIAs of 11/05/2026
Code MigrationCOBOL · higher is betterClaude Opus 5.5: 70%Claude Fable 5: 40%Vals AIAs of 10/29/2026
EMBDataroom · higher is betterClaude Opus 5.5: 84.9%Claude Fable 5: 85.4%Vals AIAs of 10/20/2026
Finance Agent (v2)All-Pass · higher is betterClaude Opus 5.5: 48.1%Claude Fable 5: 45.7%Vals AIAs of 10/29/2026
Legal Research BenchAdministrative / Regulatory · Weighted partial credit (weighted pass) · higher is betterClaude Opus 5.5: 85.4%Claude Fable 5: 90.2%Vals AIAs of 11/05/2026
LMArena Code Arena WebDevImage to WebDev · higher is betterTest setup not documented as identicalClaude Opus 5.5: 1,753Claude Fable 5: 1,623LMArenaAs of 10/19/2026
LMArena Text, Style ControlChinese · higher is betterClaude Opus 5.5: 1,574Claude Fable 5: 1,555LMArenaAs of 10/28/2026
LMArena Vision, Style ControlDiagram understanding · higher is betterClaude Opus 5.5: 1,330Claude Fable 5: 1,353LMArenaAs of 10/19/2026
ProgramBenchFully Resolved · higher is betterClaude Opus 5.5: 18.5%Claude Fable 5: 2.0%Vals AIAs of 11/05/2026
Tax Agent BenchControversy & Precedence Analysis (weighted pass) · higher is betterClaude Opus 5.5: 66.9%Claude Fable 5: 68.4%Vals AIAs of 11/05/2026
Terminal-Bench 4.0Media · higher is betterClaude Opus 5.5: 75%Claude Fable 5: 50%Vals AIAs of 11/05/2026
Terminal-Bench-ScienceEngineering Sciences · higher is betterClaude Opus 5.5: 22.2%Claude Fable 5: 0.0%Vals AIAs of 11/05/2026
Code MigrationCode Quality · higher is betterClaude Opus 5.5: 4.541 / 5Claude Fable 5: 4.442 / 5Vals AIAs of 10/29/2026
EMBDCF · higher is betterClaude Opus 5.5: 70.1%Claude Fable 5: 68.9%Vals AIAs of 10/20/2026
Finance Agent (v2)Comparables · higher is betterClaude Opus 5.5: 45.8%Claude Fable 5: 44.0%Vals AIAs of 10/29/2026
Legal Research BenchBusiness & Commercial · All-pass · higher is betterClaude Opus 5.5: 48.8%Claude Fable 5: 51.2%Vals AIAs of 11/05/2026
LMArena Code Arena WebDevReact development · higher is betterTest setup not documented as identicalClaude Opus 5.5: 1,860Claude Fable 5: 1,630LMArenaAs of 10/28/2026
LMArena Text, Style ControlCoding · higher is betterClaude Opus 5.5: 1,551Claude Fable 5: 1,550LMArenaAs of 10/28/2026
LMArena Vision, Style ControlEnglish · higher is betterClaude Opus 5.5: 1,284Claude Fable 5: 1,303LMArenaAs of 10/19/2026
ProgramBenchRaw Pass Rate · higher is betterClaude Opus 5.5: 87.0%Claude Fable 5: 76.8%Vals AIAs of 11/05/2026
Tax Agent BenchCurrent & Temporal Analysis · higher is betterClaude Opus 5.5: 46.6%Claude Fable 5: 53.2%Vals AIAs of 11/05/2026
Terminal-Bench 4.0ML · higher is betterClaude Opus 5.5: 81.8%Claude Fable 5: 42.4%Vals AIAs of 11/05/2026
Terminal-Bench-ScienceLife Sciences · higher is betterClaude Opus 5.5: 52.6%Claude Fable 5: 10.5%Vals AIAs of 11/05/2026
EMBLBO · higher is betterClaude Opus 5.5: 69.0%Claude Fable 5: 65.9%Vals AIAs of 10/20/2026
Finance Agent (v2)Disclosure Analysis · higher is betterClaude Opus 5.5: 71.0%Claude Fable 5: 68.8%Vals AIAs of 10/29/2026
Legal Research BenchBusiness & Commercial · Weighted partial credit (weighted pass) · higher is betterClaude Opus 5.5: 71.0%Claude Fable 5: 91.4%Vals AIAs of 11/05/2026
LMArena Code Arena WebDevWeb development · higher is betterTest setup not documented as identicalClaude Opus 5.5: 1,810Claude Fable 5: 1,624LMArenaAs of 10/28/2026
LMArena Text, Style ControlCreative writing · higher is betterClaude Opus 5.5: 1,520Claude Fable 5: 1,501LMArenaAs of 10/28/2026
LMArena Vision, Style ControlHomework · higher is betterClaude Opus 5.5: 1,351Claude Fable 5: 1,352LMArenaAs of 10/19/2026
Tax Agent BenchCurrent & Temporal Analysis (weighted pass) · higher is betterClaude Opus 5.5: 73.3%Claude Fable 5: 71.0%Vals AIAs of 11/05/2026
Terminal-Bench 4.0Operations · higher is betterClaude Opus 5.5: 29.6%Claude Fable 5: 25.9%Vals AIAs of 11/05/2026
Terminal-Bench-ScienceMathematical Sciences · higher is betterClaude Opus 5.5: 58.8%Claude Fable 5: 11.8%Vals AIAs of 11/05/2026
EMBM&A · higher is betterClaude Opus 5.5: 82.3%Claude Fable 5: 80.6%Vals AIAs of 10/20/2026
Finance Agent (v2)Earnings Analysis · higher is betterClaude Opus 5.5: 78.0%Claude Fable 5: 77.3%Vals AIAs of 10/29/2026
Legal Research BenchCivil Litigation · All-pass · higher is betterClaude Opus 5.5: 48.1%Claude Fable 5: 44.4%Vals AIAs of 11/05/2026
LMArena Text, Style ControlEnglish · higher is betterClaude Opus 5.5: 1,516Claude Fable 5: 1,512LMArenaAs of 10/28/2026

More comparisons

Compare Claude Opus 5.5 and Claude Fable 5 with the models people compare them with most often.

Compare another matchup

The most popular comparisons

  1. 1Claude Opus 5.5 vs. GPT-6 Astra
  2. 2Claude Opus 5.5 vs. Claude Sonnet 5.5
  3. 3Claude Opus 5.5 vs. DeepSeek-V4-Pro
  4. 4Claude Opus 5.5 vs. Kimi K3.1 Pro
  5. 5Claude Opus 5.5 vs. Gemini 4 Argon
  6. 6Claude Opus 5.5 vs. Gemini 3.8 Flash
  7. 7Claude Opus 5.5 vs. Claude Fable 5.1
  8. 8Claude Opus 5.5 vs. DeepSeek-V4.1-Flash
  9. 9Claude Opus 5.5 vs. Qwen 3.8 Max 0902
Show all 58 comparisons
  1. 10Claude Opus 5.5 vs. GLM-5.3-Flash
  2. 11Claude Opus 5.5 vs. GPT-6.1 Sol
  3. 12Claude Opus 5.5 vs. Kimi K3
  4. 13Claude Opus 5.5 vs. Claude Sonnet 5
  5. 14Claude Opus 5.5 vs. Claude Haiku 5.5
  6. 15Claude Opus 5.5 vs. GLM-5.3
  7. 16Claude Opus 5.5 vs. GPT-5.6 Terra
  8. 17Claude Opus 5.5 vs. Gemini 3.1 Pro Preview
  9. 18Claude Opus 5.5 vs. Claude Opus 4.6
  10. 19Claude Opus 5.5 vs. Claude Sonnet 4.6
  11. 20Claude Opus 5.5 vs. Qwen 3.8 27B
  12. 21Claude Opus 5.5 vs. Grok 4.6
  13. 22Claude Opus 5.5 vs. GLM-5.2
  14. 23Claude Opus 5.5 vs. Gemini 4 Carbon
  15. 24Claude Opus 5.5 vs. DeepSeek V4.1 Flash 1017
  16. 25Claude Opus 5.5 vs. Claude Sonnet 4.5
  17. 26Claude Opus 5.5 vs. Muse Spark 1.3
  18. 27Claude Opus 5.5 vs. Claude Opus 4.8
  19. 28Claude Opus 5.5 vs. GPT-5.6 Luna
  20. 29Claude Opus 5.5 vs. Mistral Large 4
  21. 30Claude Sonnet 5.5 vs. Claude Fable 5
  22. 31Claude Opus 5.5 vs. GPT-5.6 Sol
  23. 32Claude Opus 5.5 vs. GPT-5.5
  24. 33Claude Opus 5.5 vs. DeepSeek-V4-Flash
  25. 34Claude Opus 5.5 vs. Grok 4.7
  26. 35Claude Opus 5.5 vs. Mistral Large 3
  27. 36Claude Opus 5.5 vs. GPT-6 Luna
  28. 37Claude Opus 5.5 vs. Claude Opus 4.5
  29. 38Claude Opus 5.5 vs. GPT-6 Sol
  30. 39Claude Fable 5 vs. DeepSeek-V4.1-Flash
  31. 40Claude Opus 5.5 vs. Gemini 3.6 Flash
  32. 41Claude Opus 5.5 vs. Mistral Medium 3.5
  33. 42Claude Opus 5.5 vs. Muse Wonder Full
  34. 43Claude Opus 5.5 vs. Claude Haiku 4.5
  35. 44Claude Fable 5 vs. GPT-6 Astra
  36. 45Claude Haiku 5.5 vs. Claude Fable 5
  37. 46Claude Opus 5.5 vs. Gemini 3.5 Flash
  38. 47Claude Opus 5.5 vs. GPT-6.1 Terra
  39. 48Claude Fable 5 vs. Kimi K3
  40. 49Claude Opus 5.5 vs. GPT-5.4
  41. 50Claude Opus 5.5 vs. GLM-5.1
  42. 51Claude Fable 5 vs. Gemini 3.8 Flash
  43. 52Claude Fable 5 vs. Qwen 3.8 27B
  44. 53Claude Fable 5 vs. GPT-6 Luna
  45. 54Claude Fable 5 vs. GPT-6.1 Sol
  46. 55Claude Fable 5 vs. Mistral Large 4
  47. 56Claude Fable 5 vs. Gemini 4 Carbon
  48. 57Claude Fable 5 vs. Gemini 4 Argon
  49. 58Claude Fable 5 vs. Muse Wonder Full