OpenAI: GPT-5.1-Codex-Mini vs Anthropic: Claude Sonnet 5: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI: GPT-5.1-Codex-Mini (openai/gpt-5.1-codex-mini) vs Anthropic: Claude Sonnet 5 (anthropic/claude-sonnet-5). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI: GPT-5.1-Codex-Mini (openai/gpt-5.1-codex-mini) 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).
Anthropic: Claude Sonnet 5 (anthropic/claude-sonnet-5) — $25,000 Startup Credits & 50% Cache Promo
Anthropic's Q4 2026 developer promotion combines $25,000 in Claude API credits for early-stage builders with a permanent 20% base price reduction on Opus 5.5 ($4/$20), 0.05x ($0.20/1M) prompt cache reads, and 50% off Batch API processing ($2/$10 with 300K max output).
In Etuki October 2026 FinOps telemetry comparing OpenAI: GPT-5.1-Codex-Mini (API ID: openai/gpt-5.1-codex-mini) vs Anthropic: Claude Sonnet 5 (API ID: anthropic/claude-sonnet-5), OpenAI: GPT-5.1-Codex-Mini offers lower standard input pricing at $0.25/1M tokens ($2/1M output), while OpenAI: GPT-5.1-Codex-Mini leads in cached prefix economics at $0.125/1M tokens (50% discount). OpenAI: GPT-5.1-Codex-Mini 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-Mini | Anthropic: Claude Sonnet 5 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openai/gpt-5.1-codex-mini | anthropic/claude-sonnet-5 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.25 / $2 | $2 / $10 | OpenAI: GPT-5.1-Codex-Mini |
| Cache Read Price (per 1M) | $0.125/1M (50% Off) | $1/1M (50% Off) | OpenAI: GPT-5.1-Codex-Mini |
| Context Window / Max Output | 391K In / 125K Out | 977K In / 125K Out | OpenAI: GPT-5.1-Codex-Mini |
| P90 First-Token / Edge Latency | 280ms | 280ms | OpenAI: GPT-5.1-Codex-Mini (-0ms) |
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reaso
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-Mini to Anthropic: Claude Sonnet 5
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reaso Verified P90 latency of 280ms.