Claude 4.1 Opus vs
Claude Mythos 5

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
200,000
VS
A
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 45.37).
  2. Input API price: Claude Mythos 5 has the lower verified rate ($10 / 1M tokens vs $15 / 1M tokens).
  3. Output API price: Claude Mythos 5 has the lower verified rate ($50 / 1M tokens vs $75 / 1M tokens).
  4. Context window: Claude Mythos 5 has the larger published context window (1,000,000 tokens vs 200,000 tokens).

Shared metric view

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

Comparable metric detail

  • AgenticClaude 4.1 Opus: 45.59 · Claude Mythos 5: 75.79
  • CodingClaude 4.1 Opus: 46.38 · Claude Mythos 5: 81.66
  • KnowledgeClaude 4.1 Opus: Unavailable · Claude Mythos 5: 97.4
  • MultimodalGroundedClaude 4.1 Opus: Unavailable · Claude Mythos 5: 84.8
  • OverallClaude 4.1 Opus: 45.37 · Claude Mythos 5: 83.4

Source metrics

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

Source metric comparison
MetricUnitClaude 4.1 OpusClaude Mythos 5
Agenticscore45.5975.79
Codingscore46.3881.66
KnowledgescoreUnavailable97.4
MultimodalGroundedscoreUnavailable84.8
Overallscore45.3783.4

Agentic

Unit
score
Claude 4.1 Opus
45.59
Claude Mythos 5
75.79

Coding

Unit
score
Claude 4.1 Opus
46.38
Claude Mythos 5
81.66

Knowledge

Unit
score
Claude 4.1 Opus
Unavailable
Claude Mythos 5
97.4

MultimodalGrounded

Unit
score
Claude 4.1 Opus
Unavailable
Claude Mythos 5
84.8

Overall

Unit
score
Claude 4.1 Opus
45.37
Claude Mythos 5
83.4

Pricing and context

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

Route pricing and context comparison
FieldUnitClaude 4.1 OpusClaude Mythos 5
Input API priceUSD / 1M tokens$15$10
Cached input API priceUSD / 1M tokensNot verified$1
Output API priceUSD / 1M tokens$75$50
Route contexttokens200,0001,000,000
Input modalitiespublished listNot verifiedNot verified
Output modalitiespublished listNot verifiedNot verified

Input API price

Unit
USD / 1M tokens
Claude 4.1 Opus
$15
Claude Mythos 5
$10

Cached input API price

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

Output API price

Unit
USD / 1M tokens
Claude 4.1 Opus
$75
Claude Mythos 5
$50

Route context

Unit
tokens
Claude 4.1 Opus
200,000
Claude Mythos 5
1,000,000

Input modalities

Unit
published list
Claude 4.1 Opus
Not verified
Claude Mythos 5
Not verified

Output modalities

Unit
published list
Claude 4.1 Opus
Not verified
Claude Mythos 5
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 4.1 Opus — source benchlm · artifact models · model claude-4-1-opus
  • Claude Mythos 5 — source benchlm · artifact models · model claude-mythos-5
Selected price routes
  • Claude 4.1 Opus — route benchlm:claude-4-1-opus · source benchlm · provider anthropic
  • Claude Mythos 5 — route benchlm:claude-mythos-5 · source benchlm · provider anthropic

Switch model pair

Choose from this result’s current and reviewed related models. Switching opens a reviewed comparison; it does not change this result’s evidence.

Step 1

Start with popular models, or search the full selectable directory.

Step 2

Start with popular models, or search the full selectable directory.