Tier: reasoning
Context: 200K
Cheapest Host: OpenAI Direct
Deprecation Alert: 2026-12-11
OpenAI o3 (Frontier Reasoning) Cloud Pricing, API Cost Calculator & Cheapest Providers
Live unit economics and multi-provider host arbitrage for OpenAI o3 (Frontier Reasoning) (openai/o3).
Input tokens cost $2.00/1M, output tokens cost
$8.00/1M, and prompt cache reads drop to
$0.50/1M.
Input / Output / Cache Read
$2.00 / $8.00
Per 1M tokens · Cache Read: $0.50/1M
10,000 DAU Monthly Bill
$48,240/mo
Drops to $34,065/mo at 75% prompt cache hit rate
Speed & Context Spec
96 tok/s
1. Cheapest Cloud Providers for OpenAI o3 (Frontier Reasoning) (2026 Cloud Pricing & Latency Matrix)
Compare the cheapest cloud providers and GPU endpoints hosting OpenAI o3 (Frontier Reasoning) anchored by input price, output price, cache read discount, Time-to-First-Token (TTFT < 400ms SLA), and throughput speed:
| Provider / Endpoint | Input / 1M | Output / 1M | Cache Read / 1M | TTFT Latency & SLA | Throughput | 10K DAU Monthly Bill | Action |
|---|---|---|---|---|---|---|---|
| OpenAI Direct #1 Recommended Router | $2.00 | $8.00 | $0.50 | 292ms <400ms SLA ✓ | 96 tok/s | $48,240/mo | Deploy (Route with 0% Markup Fallback) → |
| OpenRouter | $2.00 | $8.00 | $0.50 | 298ms <400ms SLA ✓ | 94 tok/s | $48,240/mo | Deploy (Unified API for 470+ Models) → |
⚡ Live Provider Disparity Anchor: OpenAI Direct delivers OpenAI o3 (Frontier Reasoning) at $2.00/1M input while maintaining a real-time <400ms TTFT SLA (96 tok/s peak).
2. Monthly SaaS Spend by DAU Scale & Prompt Cache Hit Rate
Exact monthly spend projections across 1,000 DAU, 10,000 DAU, and 50,000 DAU with 0%, 50%, 75%, and 90% prompt caching:
| Active Users (DAU) | Uncached (0% Hit) | 50% Cache Hit | 75% Cache Hit (RAG) | 90% Cache Hit (Agents) |
|---|---|---|---|---|
| 1,000 DAU (1.55B tok/mo) | $4,824/mo | $3,879/mo | $3,407/mo | $3,123/mo |
| 10,000 DAU (15.5B tok/mo) | $48,240/mo | $38,790/mo | $34,065/mo | $31,230/mo |
| 50,000 DAU (77.4B tok/mo) | $241,200/mo | $193,950/mo | $170,325/mo | $156,150/mo |
3. Frequently Asked Questions (OpenAI o3 (Frontier Reasoning))
What are the cheapest cloud providers for OpenAI o3 (Frontier Reasoning) in 2026?
For OpenAI o3 (Frontier Reasoning) (openai/o3), the cheapest cloud providers and GPU endpoints among 2 verified hosts are OpenAI Direct, OpenRouter, starting at $2.00 per 1M input tokens, $8.00 per 1M output tokens, and $0.50 per 1M cached input reads (96 tok/s throughput). Teams can also claim $200 in free DigitalOcean GPU Droplet credits, $300 in Vultr Cloud GPU credits, or $5-$500 in RunPod Serverless vLLM bonus credits.
What is the OpenAI o3 (Frontier Reasoning) cloud pricing per 1M tokens?
OpenAI o3 (Frontier Reasoning) (OpenAI) cloud pricing is $2.00 per 1M input tokens, $8.00 per 1M output tokens, and $0.50 per 1M cached input tokens. Its context window is 200K (200,000 tokens) with 100,000 max output tokens.
How much does OpenAI o3 (Frontier Reasoning) cost per month at 1,000, 10,000, and 50,000 DAU?
On a standard SaaS production workload (12 requests/user/day, 3,500 input + 800 output tokens), OpenAI o3 (Frontier Reasoning) costs $4,824/month at 1,000 DAU, $48,240/month at 10,000 DAU, and $241,200/month at 50,000 DAU. Enabling 75% prompt caching reduces the 10,000 DAU bill to $34,065/month.
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