OpenAIVerified Active: September 18, 2026

GPT-6 AstraAPI Pricing & Specifications

OpenAI's frontier large language model with 1.05M context window, 272K tiered pricing threshold, and selective multi-tier reasoning.

📊 Core Specifications & Pricing Rates

Standard Input
$10.00 / 1M tokens
Standard Output
$50.00 / 1M tokens
Cached Input
$1.0000 / 1M tokens
Cache Write
$12.50 / 1M tokens
Context Window
1.05M (1,050,000 tokens)
Max Output Tokens
128,000 tokens
Supported Capabilities:✓ Vision✓ Function Calling / Tools✓ JSON Mode✓ Deep Reasoning
⚡ Tiered Context Threshold: For prompts > 272K tokens, input rate steps up to $20.00/1M, output steps up to $75.00/1M, cached read steps up to $2.00/1M, and cache write steps up to $25.00/1M.
đŸ“Ļ Asynchronous Batch API Supported: Official provider documentation offers a 50% discount on non-streaming 24h batch requests.

Live Workload Cost Estimator: GPT-6 Astra

Adjust token volumes to simulate your exact monthly API bill.

Interactive Simulation
ℹī¸ Context Tier Threshold: Standard rate is $10.00 in / $50.00 out (≤272K). Requests exceeding 272K tokens reprice to $20.00 in / $75.00 out / $2.00 cached / $25.00 write per 1M.
Estimated 60% repeated context
Estimated Total Monthly Cost
$672.50/ month
$0.02690 per API request(Saves $202.50/mo with caching)
Compare All Models in Calculator→

💡 Estimated Monthly Workload Scenarios

Autonomous Software Architect

$2025.00/mo

15,000 multi-turn refactoring requests (6,000 input, 1,500 output)

15,000 requests â€ĸ 6000 in / 1500 out

Enterprise Security Audit (Prompt Caching)

$1040.00/mo

5,000 full-codebase audits with 80% prompt caching hit (50,000 input, 2,000 output)

5,000 requests â€ĸ 50000 in / 2000 out

⚖ī¸ Head-to-Head Competitor Comparisons

GPT-6 Astra vs. Claude Fable 5.1

Identical price point ($10 in / $50 out); Astra provides 1.05M context and 5 selectable reasoning tiers, while Fable 5.1 offers Mythos-tier safety guarantees.

Equal token rates ($10/$50)View Claude Fable 5.1 →

GPT-6 Astra vs. Claude Sonnet 5

Claude Sonnet 5 is 70% cheaper ($3/$15 vs $10/$50) and excels at day-to-day software development, while Astra handles higher-order mathematical proofs and cyber modeling.

3.3x more expensive than Sonnet 5View Claude Sonnet 5 →

📜 Historical Price Changes & Updates

2026-09-03
GPT-6 Astra released with 1,050,000 context, 128K max output, and $10/$50 token pricing with staged Daybreak cyber access.

🔗 Verified Primary Sources

All pricing, token limits, and capabilities are cross-checked against official provider documentation and live API endpoints.

↗OpenAI Developer Platform Pricing↗OpenAI Preparedness Framework Report