OpenAI O1 Mini vs Anthropic Claude Sonnet 5.5: Live Promos, Pricing, Hidden Fees & Latency
OpenAI O1 Mini (openai/o1-mini) Startup Credits & Batch API 50% Off Promo
OpenAI GPT-6.1 Sol ($2/$10 base rate) qualifies for immediate 95% automatic prefix caching ($0.10/1M), 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).
Sonnet 5.5 High-Velocity Coding Promo: $0.10/1M Cached Input & $1/$5 Batch Tier
Anthropic's September/October 2026 rollout prices Claude Sonnet 5.5 at half of Opus 5.5 ($2/$10) while activating $0.10/1M (0.05x) cached input reads and $1.00/$5.00 asynchronous batch processing.
In Etuki October 2026 FinOps telemetry comparing OpenAI O1 Mini (API ID: openai/o1-mini) vs Anthropic Claude Sonnet 5.5 (API ID: claude-sonnet-5-5), OpenAI O1 Mini offers lower standard input pricing at $1.1/1M tokens ($4.4/1M output), while Anthropic Claude Sonnet 5.5 leads in cached prefix economics at $0.1/1M tokens (95% discount). Anthropic Claude Sonnet 5.5 achieves a 55ms faster P90 time-to-first-token latency (140ms vs 195ms).
Gateway-synced rate ($1.1/$4.4 per 1M, flat 128K window). Verify upstream provider cache TTL and regional routing before high-volume batch runs.
Extended thinking tokens bill at Sonnet 5.5 standard $10/1M output rate; cache read cut 50% to $0.10/1M on Oct 7.
| Specification / FinOps Dimension | OpenAI O1 Mini | Anthropic Claude Sonnet 5.5 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openai/o1-mini | claude-sonnet-5-5 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $1.1 / $4.4 | $2 / $10 | OpenAI O1 Mini |
| Cache Read Price (per 1M) | $0.11/1M (90% Off) | $0.1/1M (95% Off) | Anthropic Claude Sonnet 5.5 |
| Context Window / Max Output | 128K In / 64K Out | 1000K In / 128K Out | Anthropic Claude Sonnet 5.5 |
| P90 First-Token / Edge Latency | 195ms | 140ms | Anthropic Claude Sonnet 5.5 (-55ms) |
OpenAI O1 Mini (openai/o1-mini): OpenRouter gateway-synced model at $1.1/1M input, $4.4/1M output, $0.11/1M cached input (128K context window).
Anthropic Sep 28, 2026 production coding workhorse ($2/$10 per 1M). Official cache read cut 50% from $0.20 to $0.10/1M effective Oct 7, 2026.
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 O1 Mini to Anthropic Claude Sonnet 5.5
Anthropic Sep 28, 2026 production coding workhorse ($2/$10 per 1M). Official cache read cut 50% from $0.20 to $0.10/1M effective Oct 7, 2026. Verified P90 latency of 140ms.