Google: Gemini 3.1 Pro Preview vs OpenAI GPT-5.3-Codex: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Google: Gemini 3.1 Pro Preview (google/gemini-3.1-pro-preview) vs OpenAI GPT-5.3-Codex (gpt-5.3-codex). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Google: Gemini 3.1 Pro Preview (google/gemini-3.1-pro-preview) — Google AI Startup Credits ($350K) & 50% Cache Promo
Google DeepMind is currently subsidizing Gemini 4 Argon at 50% off standard rates ($2.00/1M input & $10.00/1M output instead of $4/$20) until November 30, 2026, alongside 95% off Context Caching ($0.10/1M) and up to $350,000 in Google for Startups Cloud/Vertex AI credits.
OpenAI GPT-5.3-Codex (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 Google: Gemini 3.1 Pro Preview (API ID: google/gemini-3.1-pro-preview) vs OpenAI GPT-5.3-Codex (API ID: 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 GPT-5.3-Codex achieves a 30ms faster P90 time-to-first-token latency (250ms vs 280ms).
Auto-discovered via live global telemetry registry.
Enable Prompt Context Caching & Batch API to reduce repeated system prompt input token burn by 50%-97.5%.
| Specification / FinOps Dimension | Google: Gemini 3.1 Pro Preview | OpenAI GPT-5.3-Codex | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | google/gemini-3.1-pro-preview | gpt-5.3-codex | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $2 / $12 | $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 | 1024K In / 64K Out | 1000K In / 128K Out | OpenAI GPT-5.3-Codex |
| P90 First-Token / Edge Latency | 280ms | 250ms | OpenAI GPT-5.3-Codex (-30ms) |
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage acro
Dedicated agentic software engineering model tuned for multi-hour terminal and IDE sessions.
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 Google: Gemini 3.1 Pro Preview to OpenAI GPT-5.3-Codex
Dedicated agentic software engineering model tuned for multi-hour terminal and IDE sessions. Verified P90 latency of 250ms.