Claude Mythos 5 vs
Claude Sonnet 4.5

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
Model type
Proprietary
Evidence state
Estimated evidence
Published context
200,000

Key implications

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

  1. Input API price: Claude Sonnet 4.5 has the lower verified rate ($3 / 1M tokens vs $10 / 1M tokens).
  2. Output API price: Claude Sonnet 4.5 has the lower verified rate ($15 / 1M tokens vs $50 / 1M tokens).
  3. 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 Mythos 5: 75.79 · Claude Sonnet 4.5: 46.7
  • CodingClaude Mythos 5: 81.66 · Claude Sonnet 4.5: 51.82
  • KnowledgeClaude Mythos 5: 97.4 · Claude Sonnet 4.5: 74.7
  • MathClaude Mythos 5: Unavailable · Claude Sonnet 4.5: 34.9
  • MultimodalGroundedClaude Mythos 5: 84.8 · Claude Sonnet 4.5: Unavailable
  • ReasoningClaude Mythos 5: Unavailable · Claude Sonnet 4.5: 19.7
  • OverallClaude Mythos 5: 83.4 · Claude Sonnet 4.5: 54.49

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 Sonnet 4.5
Agenticscore75.7946.7
Codingscore81.6651.82
Knowledgescore97.474.7
MathscoreUnavailable34.9
MultimodalGroundedscore84.8Unavailable
ReasoningscoreUnavailable19.7
Overallscore83.454.49

Agentic

Unit
score
Claude Mythos 5
75.79
Claude Sonnet 4.5
46.7

Coding

Unit
score
Claude Mythos 5
81.66
Claude Sonnet 4.5
51.82

Knowledge

Unit
score
Claude Mythos 5
97.4
Claude Sonnet 4.5
74.7

Math

Unit
score
Claude Mythos 5
Unavailable
Claude Sonnet 4.5
34.9

MultimodalGrounded

Unit
score
Claude Mythos 5
84.8
Claude Sonnet 4.5
Unavailable

Reasoning

Unit
score
Claude Mythos 5
Unavailable
Claude Sonnet 4.5
19.7

Overall

Unit
score
Claude Mythos 5
83.4
Claude Sonnet 4.5
54.49

Pricing and context

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

Route pricing and context comparison
FieldUnitClaude Mythos 5Claude Sonnet 4.5
Input API priceUSD / 1M tokens$10$3
Cached input API priceUSD / 1M tokens$1Not verified
Output API priceUSD / 1M tokens$50$15
Route contexttokens1,000,000200,000
Input modalitiespublished listNot verifiedNot verified
Output modalitiespublished listNot verifiedNot verified

Input API price

Unit
USD / 1M tokens
Claude Mythos 5
$10
Claude Sonnet 4.5
$3

Cached input API price

Unit
USD / 1M tokens
Claude Mythos 5
$1
Claude Sonnet 4.5
Not verified

Output API price

Unit
USD / 1M tokens
Claude Mythos 5
$50
Claude Sonnet 4.5
$15

Route context

Unit
tokens
Claude Mythos 5
1,000,000
Claude Sonnet 4.5
200,000

Input modalities

Unit
published list
Claude Mythos 5
Not verified
Claude Sonnet 4.5
Not verified

Output modalities

Unit
published list
Claude Mythos 5
Not verified
Claude Sonnet 4.5
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 Sonnet 4.5 — source benchlm · artifact models · model claude-sonnet-4-5
Selected price routes
  • Claude Mythos 5 — route benchlm:claude-mythos-5 · source benchlm · provider anthropic
  • Claude Sonnet 4.5 — route benchlm:claude-sonnet-4-5 · source benchlm · provider anthropic

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