OpenAIVerified Active: September 18, 2026
GPT-5.6 SolAPI Pricing & Specifications
High-efficiency frontier reasoning engine with 1.1M context and promotional high-throughput pricing.
đ Core Specifications & Pricing Rates
Standard Input
$4.00 / 1M tokens
Standard Output
$20.00 / 1M tokens
Cached Input
$0.4000 / 1M tokens
Cache Write
$5.00 / 1M tokens
Context Window
1.1M (1,100,000 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 $8.00/1M, output steps up to $30.00/1M, cached read steps up to $0.80/1M, and cache write steps up to $10.00/1M.
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 Sol
Adjust token volumes to simulate your exact monthly API bill.
âšī¸ Context Tier Threshold: Standard rate is $4.00 in / $20.00 out (â¤272K). Requests exceeding 272K tokens reprice to $8.00 in / $30.00 out / $0.80 cached / $10.00 write per 1M.
Estimated 60% repeated context
Estimated Total Monthly Cost
Compare All Models in Calculatorâ$269.00/ month
$0.01076 per API request(Saves $81.00/mo with caching)
đĄ Estimated Monthly Workload Scenarios
Enterprise Document RAG
$1200.00/mo25,000 deep document queries (8,000 input, 800 output)
25,000 requests âĸ 8000 in / 800 out
âī¸ Head-to-Head Competitor Comparisons
GPT-5.6 Sol vs. Claude Sonnet 5
GPT-5.6 Sol offers 1.1M context with native audio streaming, while Sonnet 5 is $3/$15 with top software engineering benchmarks.
Sol is $4/$20 vs Sonnet 5 at $3/$15View Claude Sonnet 5 â
đ Historical Price Changes & Updates
2026-09-03
Price cut from $5/$30 to $4/$20 per 1M tokens alongside GPT-6 Astra launch, promo valid through Nov 2026.
đ Verified Primary Sources
All pricing, token limits, and capabilities are cross-checked against official provider documentation and live API endpoints.