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
200K
1,050K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
95
vs
86
Code Review
94
vs
84
Summarization
88
vs
92
Q&A
85
vs
92
Extraction
82
vs
90
Reasoning
97
vs
82
Classification
80
vs
89
Creative Writing
93
vs
80
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 reasoning (confidence 97 vs 82)
- -You need strong code generation (confidence 95 vs 86)
- -You need strong code review (confidence 94 vs 84)
- -You need strong creative writing (confidence 93 vs 80)
Choose GPT 5.6 Terra when...
- -You need strong summarization (confidence 92 vs 88)
- -You need strong q&a (confidence 92 vs 85)
- -You need strong extraction (confidence 90 vs 82)
- -You need strong classification (confidence 89 vs 80)
- -Cost matters: 60% cheaper on input tokens
- -You need a larger context window (1,050K vs 200K)
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 Reasoning, Code Generation, Code Review. 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 200K token context window. GPT 5.6 Terra has a 1,050K 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.