Claude Opus 5 vs
GPT-5.6 Terra

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

Anthropic

Claude Opus 5

Model type
Proprietary
Evidence state
Supported evidence
Published context
Not verified
VS
Model type
Proprietary
Evidence state
Estimated evidence
Published context
1,050,000

Key implications

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

  1. Input API price: GPT-5.6 Terra has the lower verified rate ($2.5 / 1M tokens vs $5 / 1M tokens).
  2. Output API price: GPT-5.6 Terra has the lower verified rate ($15 / 1M tokens vs $25 / 1M tokens).

Shared metric view

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

Comparable metric detail

  • AgenticClaude Opus 5: 80.13 · GPT-5.6 Terra: 58.86
  • CodingClaude Opus 5: 78.41 · GPT-5.6 Terra: 69.29
  • KnowledgeClaude Opus 5: 97 · GPT-5.6 Terra: 84.2
  • MathClaude Opus 5: Unavailable · GPT-5.6 Terra: 97
  • MultimodalGroundedClaude Opus 5: 85.9 · GPT-5.6 Terra: 71.4
  • ReasoningClaude Opus 5: 83.5 · GPT-5.6 Terra: 78.1
  • OverallClaude Opus 5: 83.06 · GPT-5.6 Terra: 72.95

Source metrics

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

Source metric comparison
MetricUnitClaude Opus 5GPT-5.6 Terra
Agenticscore80.1358.86
Codingscore78.4169.29
Knowledgescore9784.2
MathscoreUnavailable97
MultimodalGroundedscore85.971.4
Reasoningscore83.578.1
Overallscore83.0672.95

Agentic

Unit
score
Claude Opus 5
80.13
GPT-5.6 Terra
58.86

Coding

Unit
score
Claude Opus 5
78.41
GPT-5.6 Terra
69.29

Knowledge

Unit
score
Claude Opus 5
97
GPT-5.6 Terra
84.2

Math

Unit
score
Claude Opus 5
Unavailable
GPT-5.6 Terra
97

MultimodalGrounded

Unit
score
Claude Opus 5
85.9
GPT-5.6 Terra
71.4

Reasoning

Unit
score
Claude Opus 5
83.5
GPT-5.6 Terra
78.1

Overall

Unit
score
Claude Opus 5
83.06
GPT-5.6 Terra
72.95

Pricing and context

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

Route pricing and context comparison
FieldUnitClaude Opus 5GPT-5.6 Terra
Input API priceUSD / 1M tokens$5$2.5
Cached input API priceUSD / 1M tokens$0.5$0.25
Output API priceUSD / 1M tokens$25$15
Route contexttokens1,000,0001,050,000
Input modalitiespublished listNot verifiedNot verified
Output modalitiespublished listNot verifiedNot verified

Input API price

Unit
USD / 1M tokens
Claude Opus 5
$5
GPT-5.6 Terra
$2.5

Cached input API price

Unit
USD / 1M tokens
Claude Opus 5
$0.5
GPT-5.6 Terra
$0.25

Output API price

Unit
USD / 1M tokens
Claude Opus 5
$25
GPT-5.6 Terra
$15

Route context

Unit
tokens
Claude Opus 5
1,000,000
GPT-5.6 Terra
1,050,000

Input modalities

Unit
published list
Claude Opus 5
Not verified
GPT-5.6 Terra
Not verified

Output modalities

Unit
published list
Claude Opus 5
Not verified
GPT-5.6 Terra
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 Opus 5 — source benchlm · artifact models · model claude-opus-5
  • GPT-5.6 Terra — source benchlm · artifact models · model gpt-5-6-terra
Selected price routes
  • Claude Opus 5 — route benchlm:claude-opus-5 · source benchlm · provider anthropic
  • GPT-5.6 Terra — route benchlm:gpt-5-6-terra · source benchlm · provider openai

Other reviewed matchups from the same published revision, ready to open without changing this result’s evidence.

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.