OpenAI: GPT-5.1-Codex-Max vs OpenAI: GPT-6.1 Sol Pro (batch): Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI: GPT-5.1-Codex-Max (openai/gpt-5.1-codex-max) vs OpenAI: GPT-6.1 Sol Pro (batch) (openai/gpt-6.1-sol-pro:batch). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI: GPT-5.1-Codex-Max (openai/gpt-5.1-codex-max) 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-6.1 Sol Pro (batch) (openai/gpt-6.1-sol-pro:batch) 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: GPT-5.1-Codex-Max (API ID: openai/gpt-5.1-codex-max) vs OpenAI: GPT-6.1 Sol Pro (batch) (API ID: openai/gpt-6.1-sol-pro:batch), OpenAI: GPT-6.1 Sol Pro (batch) offers lower standard input pricing at $1/1M tokens ($5/1M output), while OpenAI: GPT-6.1 Sol Pro (batch) leads in cached prefix economics at $0.5/1M tokens (50% discount). OpenAI: GPT-5.1-Codex-Max 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: GPT-5.1-Codex-Max | OpenAI: GPT-6.1 Sol Pro (batch) | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openai/gpt-5.1-codex-max | openai/gpt-6.1-sol-pro:batch | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $1.25 / $10 | $1 / $5 | OpenAI: GPT-6.1 Sol Pro (batch) |
| Cache Read Price (per 1M) | $0.625/1M (50% Off) | $0.5/1M (50% Off) | OpenAI: GPT-6.1 Sol Pro (batch) |
| Context Window / Max Output | 391K In / 125K Out | 1025K In / 125K Out | OpenAI: GPT-5.1-Codex-Max |
| P90 First-Token / Edge Latency | 280ms | 280ms | OpenAI: GPT-5.1-Codex-Max (-0ms) |
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasonin
GPT-6.1 Sol Pro is the same underlying model as [GPT-6.1 Sol](https://openrouter.ai/openai/gpt-6.1-sol), served with `reasoning.mode` set to `pro` for higher-quality responses on c
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: GPT-5.1-Codex-Max to OpenAI: GPT-6.1 Sol Pro (batch)
GPT-6.1 Sol Pro is the same underlying model as [GPT-6.1 Sol](https://openrouter.ai/openai/gpt-6.1-sol), served with `reasoning.mode` set to `pro` for higher-quality responses on c Verified P90 latency of 280ms.