tokevenClaudevsGPT
Claude Opus 4.8 vs GPT 5.6 Terra
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Opus 4.8
FlagshipGPT 5.6 Terra
Mid-tierInput $/MTok
$5.00
$2.00
Output $/MTok
$25.00
$12.00
Cache discount
90% off
90% off
Context
1M
922K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
63
vs
64
Code Review
94
vs
84
Summarization
69
vs
64
Q&A
85
vs
92
Extraction
73
vs
75
Reasoning
89
vs
91
Classification
80
vs
89
Creative Writing
81
vs
67
Claude Opus 4.8
GPT 5.6 Terra
Guidance
When to use Claude Opus 4.8 vs GPT 5.6 Terra
Choose Claude Opus 4.8 when...
- -You need strong code review (confidence 94 vs 84)
- -You need strong creative writing (confidence 81 vs 67)
- -You need strong summarization (confidence 69 vs 64)
- -You need a larger context window (1M vs 922K)
Choose GPT 5.6 Terra when...
- -You need strong q&a (confidence 92 vs 85)
- -You need strong reasoning (confidence 91 vs 89)
- -You need strong classification (confidence 89 vs 80)
- -You need strong extraction (confidence 75 vs 73)
- -Cost matters: 60% cheaper on input tokens
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Opus 4.8
GPT 5.6 Terra
100K tokens
$1.10
$0.50Cheaper
1M tokens
$11.00
$8.20Cheaper
10M tokens
$110.00
$82.00Cheaper
FAQ
When should I use Claude Opus 4.8 instead of GPT 5.6 Terra?
Claude Opus 4.8 outperforms GPT 5.6 Terra for Code Review, Summarization, Creative Writing. It costs $5.00/$25.00 per million tokens (input/output).
Is GPT 5.6 Terra cheaper than Claude Opus 4.8?
Yes. GPT 5.6 Terra input costs $2.00/MTok vs $5.00/MTok for Claude Opus 4.8, saving 60% on input.
What are the context window sizes for Claude Opus 4.8 and GPT 5.6 Terra?
Claude Opus 4.8 has a 1M token context window. GPT 5.6 Terra has a 922K token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
Other comparisons
How Claude Opus 4.8 and GPT 5.6 Terra stack up against the rest of the field.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.