OpenAI: o3 vs OpenAI: GPT-5.3-Codex: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI: o3 (openai/o3) vs OpenAI: GPT-5.3-Codex (openai/gpt-5.3-codex). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI: o3 (openai/o3) Startup Credits & Batch API 50% Off Promo
OpenAI GPT-6.1 Sol ($2/$10 base rate) qualifies for immediate 75% automatic prefix caching ($0.50/1M), 50% off 24-hour Batch API completions ($1/$5), and up to $150,000 in OpenAI/Azure Foundry credits via Microsoft for Startups Founders Hub (no VC funding required for initial tiers).
OpenAI: GPT-5.3-Codex (openai/gpt-5.3-codex) Startup Credits & Batch API 50% Off Promo
OpenAI GPT-6.1 Sol ($2/$10 base rate) qualifies for immediate 75% automatic prefix caching ($0.50/1M), 50% off 24-hour Batch API completions ($1/$5), and up to $150,000 in OpenAI/Azure Foundry credits via Microsoft for Startups Founders Hub (no VC funding required for initial tiers).
In Etuki October 2026 FinOps telemetry comparing OpenAI: o3 (API ID: openai/o3) vs OpenAI: GPT-5.3-Codex (API ID: openai/gpt-5.3-codex), OpenAI: GPT-5.3-Codex offers lower standard input pricing at $1.75/1M tokens ($14/1M output), while OpenAI: GPT-5.3-Codex leads in cached prefix economics at $0.875/1M tokens (50% discount). OpenAI: o3 achieves a 0ms faster P90 time-to-first-token latency (280ms vs 280ms).
Auto-discovered via live global telemetry registry.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | OpenAI: o3 | OpenAI: GPT-5.3-Codex | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openai/o3 | openai/gpt-5.3-codex | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $2 / $8 | $1.75 / $14 | OpenAI: GPT-5.3-Codex |
| Cache Read Price (per 1M) | $1/1M (50% Off) | $0.875/1M (50% Off) | OpenAI: GPT-5.3-Codex |
| Context Window / Max Output | 195K In / 98K Out | 391K In / 125K Out | OpenAI: GPT-5.3-Codex |
| P90 First-Token / Edge Latency | 280ms | 280ms | OpenAI: o3 (-0ms) |
o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instru
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional k
Real-Time Stack Cost & Hidden-Fee Simulator (MAU / Token / Egress / GMV)
Calibrated with Reddit r/FinOps & r/devops telemetry: Includes Context Caching, Bandwidth Egress, and MoR Tax
🛰️Switch from OpenAI: o3 to OpenAI: GPT-5.3-Codex
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional k Verified P90 latency of 280ms.