Claude Mythos 5 vs
Claude Opus 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
1,000,000
VS
A

Anthropic

Claude Opus 5

Model type
Proprietary
Evidence state
Supported evidence
Published context
Not verified

Key implications

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

  1. On Agentic, Claude Opus 5 has a higher supported BenchLM score (80.13 vs 75.79).
  2. On Overall, Claude Mythos 5 has a higher supported BenchLM score (83.4 vs 83.06).
  3. Input API price: Claude Opus 5 has the lower verified rate ($5 / 1M tokens vs $10 / 1M tokens).
  4. Output API price: Claude Opus 5 has the lower verified rate ($25 / 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 · Claude Opus 5: 80.13
  • CodingClaude Mythos 5: 81.66 · Claude Opus 5: 78.41
  • KnowledgeClaude Mythos 5: 97.4 · Claude Opus 5: 97
  • MultimodalGroundedClaude Mythos 5: 84.8 · Claude Opus 5: 85.9
  • ReasoningClaude Mythos 5: Unavailable · Claude Opus 5: 83.5
  • OverallClaude Mythos 5: 83.4 · Claude Opus 5: 83.06

Source metrics

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

Source metric comparison
MetricUnitClaude Mythos 5Claude Opus 5
Agenticscore75.7980.13
Codingscore81.6678.41
Knowledgescore97.497
MultimodalGroundedscore84.885.9
ReasoningscoreUnavailable83.5
Overallscore83.483.06

Agentic

Unit
score
Claude Mythos 5
75.79
Claude Opus 5
80.13

Coding

Unit
score
Claude Mythos 5
81.66
Claude Opus 5
78.41

Knowledge

Unit
score
Claude Mythos 5
97.4
Claude Opus 5
97

MultimodalGrounded

Unit
score
Claude Mythos 5
84.8
Claude Opus 5
85.9

Reasoning

Unit
score
Claude Mythos 5
Unavailable
Claude Opus 5
83.5

Overall

Unit
score
Claude Mythos 5
83.4
Claude Opus 5
83.06

Pricing and context

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

Route pricing and context comparison
FieldUnitClaude Mythos 5Claude Opus 5
Input API priceUSD / 1M tokens$10$5
Cached input API priceUSD / 1M tokens$1$0.5
Output API priceUSD / 1M tokens$50$25
Route contexttokens1,000,0001,000,000
Input modalitiespublished listNot verifiedNot verified
Output modalitiespublished listNot verifiedNot verified

Input API price

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

Cached input API price

Unit
USD / 1M tokens
Claude Mythos 5
$1
Claude Opus 5
$0.5

Output API price

Unit
USD / 1M tokens
Claude Mythos 5
$50
Claude Opus 5
$25

Route context

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

Input modalities

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

Output modalities

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

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