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text model comparison

Claude Fable 5 vs Claude Mythos 5.2

Claude Fable 5 and Claude Mythos 5.2 are both current text models, from Anthropic. Claude Mythos 5.2 is 20% cheaper per 1M input tokens than Claude Fable 5, $8 vs $10. Both accept 1,000,000 tokens of context.

Lower price per 1M input tokens
Claude Mythos 5.2$8 against $10
Newer release
Claude Mythos 5.2Nov 2026 against Jun 2026

Data verified November 10, 2026 · Dataset 2026-11-10

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Side by side

Claude Fable 5 and Claude Mythos 5.2, line by line

Prices in effect today, compared at the same tier wherever both list one. The better value in each row is highlighted.

FactClaude Fable 5Claude Mythos 5.2
Price
Price per 1M input tokens$10$8 (better)
Price per 1M output tokens$50$40 (better)
Independent benchmarks
Arena Text1504 Elo (#5 of 53)Not measured
Arena WebDev1625 Elo (#20 of 48)Not measured
GPQA Diamond85.9% (#37 of 43)Not measured
FrontierMath Tiers 1-3 (v2)87% (#10 of 43)Not measured
SimpleQA Verified70.7% (#8 of 40)Not measured
Specs
ProviderAnthropicAnthropic
Release dateJune 9, 2026November 9, 2026
AccessAPI onlylimited access
Context window1,000,000 tokens1,000,000 tokens
Max output128,000 tokens128,000 tokens
Inputtext, imagetext, image
Outputtexttext

No independent benchmark has scored both models yet. Each rank counts the current models scored on that benchmark.

Scores:Arena · 2026-11-10Epoch AI · 2026-11-10

Charts

Against every current text model

Where Claude Fable 5 and Claude Mythos 5.2 land among the current models of their task, on every independent benchmark, on price and on context.

Where each stands

Only Claude Fable 5 has a current Arena Text score: #5 of 53. Each bar is the share of current models it beats.

Claude Fable 5 and Claude Mythos 5.2 among the current text models, one row per benchmark, price and context window.

Independent benchmarks

Arena Text

Claude Fable 5:#5of 53

1,504 Elo · ahead of 92%

Claude Mythos 5.2: Not scored

Arena WebDev

Claude Fable 5:#20of 48

1,625 Elo · ahead of 60%

Claude Mythos 5.2: Not scored

GPQA Diamond

Claude Fable 5:#37of 43

85.9% · ahead of 14%

Claude Mythos 5.2: Not scored

FrontierMath Tiers 1-3 (v2)

Claude Fable 5:#10of 43

87% · ahead of 79%

Claude Mythos 5.2: Not scored

SimpleQA Verified

Claude Fable 5:#8of 40

70.7% · ahead of 82%

Claude Mythos 5.2: Not scored

Price and context

Price per 1M input tokens

Claude Fable 5:#55of 61

$10 · cheaper than 5%

Claude Mythos 5.2:#53of 61

$8 · cheaper than 12%

Price per 1M output tokens

Claude Fable 5:#55of 61

$50 · cheaper than 5%

Claude Mythos 5.2:#53of 61

$40 · cheaper than 12%

Context window

Claude Fable 5:#28of 70

1M tokens · longer than 23%

Claude Mythos 5.2:#28of 70

1M tokens · longer than 23%

Scores fromArena · 2026-11-10Epoch AI · 2026-11-10

Quality against price

Arena Text · measured November 9, 2026

Claude Fable 5 scores 1,504 at $20 (blended price per 1M tokens). The line joins the current models no other beats on both price and Arena Text score; hover any point to name it.

Quality against priceArena Text score against price for 45 text models, Claude Fable 5 and Claude Mythos 5.2 marked.1,2501,3001,3501,4001,4501,5001,550$0.30$1$3$10MOST ATTRACTIVE QUADRANTMedian price $3Median 1,473Blended price per 1M tokens (3 input : 1 output), log scaleArena Text (Elo)Claude Fable 5
Quality against price: the data
Arena Text score against price for 45 text models, Claude Fable 5 and Claude Mythos 5.2 marked.
ModelProviderBlended price per 1M tokensArena Text (Elo)
Gemini 4 CarbonGoogle$41,526
Gemini 4 ArgonGoogle$41,522
Muse WonderMeta$81,511
Claude Opus 5.5Anthropic$81,506
Claude Fable 5Anthropic$201,504
Claude Fable 5.1Anthropic$201,503
Gemini 3.8 FlashGoogle$1.501,497
Muse Spark 1.3Meta$21,496
Claude Opus 5Anthropic$101,490
Kimi K3Moonshot Kimi$61,487
GPT-5.6 SolOpenAI$81,485
Qwen3.8-MaxAlibaba Qwen$31,484
Gemini 3.6 FlashGoogle$31,483
GLM-5.3Z.ai$2.151,483
Claude Opus 4.8Anthropic$101,482
GPT-6.1 SolOpenAI$41,482
GPT-5.5OpenAI$111,481
MiMo-V2.6-ProXiaomi MiMo$0.541,480
GPT-5.4OpenAI$5.631,475
DeepSeek-V4.1-FlashDeepSeek$0.521,475
GPT-6 AstraOpenAI$201,474
GLM-5.3-FlashZ.ai$0.241,474
Gemini 3 Flash PreviewGoogle$1.131,473
Grok 4.20xAI$1.561,472
Claude Sonnet 5.5Anthropic$41,472
GPT-5.6 TerraOpenAI$4.501,468
Grok 4.5xAI$31,466
DeepSeek-V4-ProDeepSeek$1.981,464
Claude Sonnet 5Anthropic$41,461
GPT-6 SolOpenAI$41,457
Grok 4.6xAI$31,456
Gemini 3.5 Flash-LiteGoogle$0.851,455
GPT-5.6 LunaOpenAI$0.451,453
MiMo-V2.6-FlashXiaomi MiMo$0.181,448
Step 5 PreviewStepFun$1.431,448
Grok 4.3xAI$1.561,442
Grok 4.7xAI$31,442
GPT-6 LunaOpenAI$0.201,441
Mistral Large 4Mistral AI$1.051,423
Claude Haiku 5.5Anthropic$0.201,422
GPT-4.1OpenAI$3.501,415
Inkling 2 SmallThinking Machines Lab$0.471,412
Solar Pro 4Upstage$0.521,387
GPT-4.1 miniOpenAI$0.701,383
GPT-4.1 nanoOpenAI$0.181,322

Cost

What each costs

Example workloads at each provider's listed rates, then every other rate either one lists. The cheaper figure in each row is highlighted.

The same work, priced

For 10M input and 2M output tokens, Claude Fable 5 costs 1.3 times as much as Claude Mythos 5.2, at each provider's listed rates.

What Claude Fable 5 and Claude Mythos 5.2 cost for the same work, at the rates each provider lists.

  • 10M input and 2M output tokens

    Claude Fable 5 costs 1.3× as much

    Claude Fable 5
    $200
    Claude Mythos 5.2
    $160

  • The same, with 9M of the input tokens cached

    Claude Fable 5 costs 1.3× as much

    Claude Fable 5
    $119
    Claude Mythos 5.2
    $89.80
Workload or rateClaude Fable 5Claude Mythos 5.2
Example workloads
10M input and 2M output tokens$200$160 (better)
The same, with 9M of the input tokens cached$119$89.80 (better)
The same, through the batch APINot listed$80
Other listed rates
1M input tokens, cached$1$0.20 (better)
1M input tokens, 5-minute cache writeNot listed$10
1M input tokens, 1-hour cache writeNot listed$16
1M input tokens, batchNot listed$4
1M output tokens, batchNot listed$20

Your own bill will differ. These figures use list prices and example workloads. The AI Model Cost Audit reviews your real usage, shortlists models that score as well for each task for less, and estimates the savings.

Launch price $100, regular price $150

Book the cost audit

Verdict

When to choose each

Claude Fable 5

Where it leads

No measured lead over Claude Mythos 5.2 in this data.

Best for

  • Long-horizon coding, reasoning, and knowledge-work evaluations

Watch out for

  • Fable requires 30-day data retention, and classifier-triggered requests fall back to Claude Opus 4.8
Full Claude Fable 5 profile

Claude Mythos 5.2

Where it leads

  • Lower input and output prices, $8 and $40 vs $10 and $50 per 1M tokens
  • Cheaper cached input, $0.20 vs $1 per 1M tokens
  • Batch pricing, $4 input and $20 output per 1M tokens

Best for

  • Vetted security teams finding, reproducing and fixing vulnerabilities
  • Dual-use research in security or biology that Claude Fable 5.2's safeguards block

Watch out for

  • Limited access: only organisations verified through Anthropic's programs, such as the Cyber Verification Program, can call it
  • No independent benchmark has scored it; every number for it comes from Anthropic
Full Claude Mythos 5.2 profile

From benchmark to production

Building on Claude Fable 5 or Claude Mythos 5.2?

Public scores rarely hold on your own data. We test both models on your real tasks, then build the agent or pipeline around the one that wins.

AI Model Cost AuditLaunch price $100, regular price $150What the audit includes

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FAQ

Claude Fable 5 vs Claude Mythos 5.2 FAQ

Which is cheaper, Claude Fable 5 or Claude Mythos 5.2?

Claude Mythos 5.2 is 20% cheaper per 1M input tokens than Claude Fable 5, $8 vs $10. For 10M input and 2M output tokens, Claude Fable 5 costs $200 and Claude Mythos 5.2 $160 at standard rates.

Which is cheaper with prompt caching, Claude Fable 5 or Claude Mythos 5.2?

Claude Fable 5 charges $1 per 1M cached input tokens, 90% below its standard input rate, and Claude Mythos 5.2 $0.20, 98% below. With 9M of 10M input tokens cached and 2M output tokens, Claude Fable 5 costs $119 and Claude Mythos 5.2 $89.80.

Which has the larger context window, Claude Fable 5 or Claude Mythos 5.2?

Both accept 1,000,000 tokens of context. Both return up to 128,000 tokens per response.

Further reading

More on Claude Fable 5 and Claude Mythos 5.2

Articles on Claude Fable 5 and Claude Mythos 5.2

Related comparisons

Production evaluation

Choosing between Claude Fable 5 and Claude Mythos 5.2?

Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.

  • A head-to-head evaluation on your real workload
  • Routing between models by cost and difficulty
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