OpenAIVerified Active: September 18, 2026
GPT-5.6 TerraAPI Pricing & Specifications
Balanced mid-tier reasoning and agentic engine optimized for cost-effective enterprise workflows.
đ Core Specifications & Pricing Rates
Standard Input
$2.00 / 1M tokens
Standard Output
$12.00 / 1M tokens
Cached Input
$0.2000 / 1M tokens
Cache Write
$2.50 / 1M tokens
Context Window
1.05M (1,050,000 tokens)
Max Output Tokens
128,000 tokens
Supported Capabilities:â Visionâ Function Calling / Toolsâ JSON Modeâ Deep Reasoning
⥠Tiered Context Threshold: For prompts > 272K tokens, input rate steps up to $4.00/1M, output steps up to $18.00/1M, cached read steps up to $0.40/1M, and cache write steps up to $5.00/1M.
đĻ Asynchronous Batch API Supported: Official provider documentation offers a 50% discount on non-streaming 24h batch requests.
Live Workload Cost Estimator: GPT-5.6 Terra
Adjust token volumes to simulate your exact monthly API bill.
âšī¸ Context Tier Threshold: Standard rate is $2.00 in / $12.00 out (â¤272K). Requests exceeding 272K tokens reprice to $4.00 in / $18.00 out / $0.40 cached / $5.00 write per 1M.
Estimated 60% repeated context
Estimated Total Monthly Cost
Compare All Models in Calculatorâ$154.50/ month
$0.00618 per API request(Saves $40.50/mo with caching)
đĄ Estimated Monthly Workload Scenarios
Enterprise Customer Support RAG
$280.00/mo20,000 knowledge base queries (4,000 input, 500 output)
20,000 requests âĸ 4000 in / 500 out
âī¸ Head-to-Head Competitor Comparisons
GPT-5.6 Terra vs. Claude Sonnet 5
Terra is 33% cheaper on input ($2 vs $3) and 20% cheaper on output ($12 vs $15).
1.5x cheaper input than Sonnet 5View Claude Sonnet 5 â
đ Historical Price Changes & Updates
2026-07-09
GPT-5.6 Terra released as balanced tier at $2.00 input / $12.00 output per 1M tokens.
đ Verified Primary Sources
All pricing, token limits, and capabilities are cross-checked against official provider documentation and live API endpoints.