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OpenAI vs Anthropic

GPT-5.6 Terra vs Claude Opus 5: pricing comparison

GPT-5.6 Terra costs 2.2× less than Claude Opus 5 for a typical 1,000-input, 500-output request. Here is how the two compare on price, context and discounts.

Prices last updated:

GPT-5.6 TerraClaude Opus 5
ProviderOpenAIAnthropic
Input per 1M tokens$2.00$5.00
Output per 1M tokens$12.00$25.00
Context window1.05M1M
Batch discount50% off50% off
Typical request (1,000 in / 500 out)$0.008$0.0175
Monthly at 1,000 requests/day$240.00$525.00

GPT-5.6 Terra: Inputs above 272K tokens are billed at a higher long-context rate ($4 / $18).

Compare with your own numbers

GPT-5.6 Terra per request
$0.008
Per month
$240.00
Claude Opus 5 per request
$0.0175
Per month
$525.00

Cost by task

Cost per 1,000 requests at standard prices.
TaskTokens (in / out)GPT-5.6 TerraClaude Opus 5
Short chat reply500 / 300$4.60$10.00
RAG answer6,000 / 600$19.20$45.00
Summarize a long document12,000 / 1,000$36.00$85.00
Output-heavy generation1,000 / 4,000$50.00$105.00

Output tokens usually dominate the bill — see input vs output token cost.

Frequently asked questions

Is GPT-5.6 Terra or Claude Opus 5 cheaper?
GPT-5.6 Terra is cheaper for a typical request of 1,000 input and 500 output tokens: $0.008 versus $0.0175 for Claude Opus 5, about 54% less.
What are the per-token prices of GPT-5.6 Terra and Claude Opus 5?
GPT-5.6 Terra costs $2.00 input and $12.00 output per million tokens. Claude Opus 5 costs $5.00 input and $25.00 output per million tokens.
Which has the larger context window, GPT-5.6 Terra or Claude Opus 5?
GPT-5.6 Terra has the larger context window: 1.05M tokens versus 1M for Claude Opus 5.

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