Claude Mythos 5 vs
Grok 4.1 Fast

Read the published evidence, route context, and missing facts before making a local decision. This page does not name a universal winner.

Models in this comparison

Provider identity and evidence state stay balanced across the pair.

A
Model type
Proprietary
Evidence state
Supported evidence
Published context
1,000,000
VS
Model type
Proprietary
Evidence state
Supported evidence
Published context
1,000,000

Key implications

Limited shared-metric coverage. Each finding is tied to a published metric, price, context, or modality fact.

  1. On Overall, Claude Mythos 5 has a higher supported BenchLM score (83.4 vs 50.88).
  2. Input API price: Grok 4.1 Fast has the lower verified rate ($0.2 / 1M tokens vs $10 / 1M tokens).
  3. Output API price: Grok 4.1 Fast has the lower verified rate ($0.5 / 1M tokens vs $50 / 1M tokens).

Shared metric view

A radar is shown only when at least four compatible supported score metrics are published.

Comparable metric detail

  • AgenticClaude Mythos 5: 75.79 · Grok 4.1 Fast: Unavailable
  • CodingClaude Mythos 5: 81.66 · Grok 4.1 Fast: Unavailable
  • KnowledgeClaude Mythos 5: 97.4 · Grok 4.1 Fast: Unavailable
  • MultimodalGroundedClaude Mythos 5: 84.8 · Grok 4.1 Fast: Unavailable
  • OverallClaude Mythos 5: 83.4 · Grok 4.1 Fast: 50.88

Source metrics

Friendly metric names and published units stay visible. Missing measurements remain unavailable rather than becoming a score.

Source metric comparison
MetricUnitClaude Mythos 5Grok 4.1 Fast
Agenticscore75.79Unavailable
Codingscore81.66Unavailable
Knowledgescore97.4Unavailable
MultimodalGroundedscore84.8Unavailable
Overallscore83.450.88

Agentic

Unit
score
Claude Mythos 5
75.79
Grok 4.1 Fast
Unavailable

Coding

Unit
score
Claude Mythos 5
81.66
Grok 4.1 Fast
Unavailable

Knowledge

Unit
score
Claude Mythos 5
97.4
Grok 4.1 Fast
Unavailable

MultimodalGrounded

Unit
score
Claude Mythos 5
84.8
Grok 4.1 Fast
Unavailable

Overall

Unit
score
Claude Mythos 5
83.4
Grok 4.1 Fast
50.88

Pricing and context

Verification is shown beside each selected route. Missing facts remain Not verified.

Route pricing and context comparison
FieldUnitClaude Mythos 5Grok 4.1 Fast
Input API priceUSD / 1M tokens$10$0.2
Cached input API priceUSD / 1M tokens$1Not verified
Output API priceUSD / 1M tokens$50$0.5
Route contexttokens1,000,0002,000,000
Input modalitiespublished listNot verifiedNot verified
Output modalitiespublished listNot verifiedNot verified

Input API price

Unit
USD / 1M tokens
Claude Mythos 5
$10
Grok 4.1 Fast
$0.2

Cached input API price

Unit
USD / 1M tokens
Claude Mythos 5
$1
Grok 4.1 Fast
Not verified

Output API price

Unit
USD / 1M tokens
Claude Mythos 5
$50
Grok 4.1 Fast
$0.5

Route context

Unit
tokens
Claude Mythos 5
1,000,000
Grok 4.1 Fast
2,000,000

Input modalities

Unit
published list
Claude Mythos 5
Not verified
Grok 4.1 Fast
Not verified

Output modalities

Unit
published list
Claude Mythos 5
Not verified
Grok 4.1 Fast
Not verified

Evidence provenance

Source records, route identity, timestamps, and methodology are consolidated here without declaring either model a winner.

Publication time
Aug 30, 2026, 2:15 AM UTC
Freshness
Stale — Published weekly benchmark evidence has not refreshed within 8 days.
Methodology
benchlm: benchlm_raw_composite
Model records
  • Claude Mythos 5 — source benchlm · artifact models · model claude-mythos-5
  • Grok 4.1 Fast — source benchlm · artifact models · model grok-4-1-fast
Selected price routes
  • Claude Mythos 5 — route benchlm:claude-mythos-5 · source benchlm · provider anthropic
  • Grok 4.1 Fast — route benchlm:grok-4-1-fast · source benchlm · provider xai

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