Anthropic Claude Opus 5.5 vs OpenAI: GPT-5 Mini: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Anthropic Claude Opus 5.5 (claude-opus-5-5) vs OpenAI: GPT-5 Mini (openai/gpt-5-mini). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Claude for Startups Program ($25,000 API Credits) & 95% Off Ephemeral Cache Reads
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).
OpenAI: GPT-5 Mini (openai/gpt-5-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).
In Etuki October 2026 FinOps telemetry comparing Anthropic Claude Opus 5.5 (API ID: claude-opus-5-5) vs OpenAI: GPT-5 Mini (API ID: openai/gpt-5-mini), OpenAI: GPT-5 Mini offers lower standard input pricing at $0.25/1M tokens ($2/1M output), while OpenAI: GPT-5 Mini leads in cached prefix economics at $0.125/1M tokens (50% discount). OpenAI: GPT-5 Mini achieves a 70ms faster P90 time-to-first-token latency (280ms vs 350ms).
Adaptive thinking is always on; high effort generates ~119K thinking tokens/task. Fast mode costs $8/$40; inference_geo:"us" adds +10%.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | Anthropic Claude Opus 5.5 | OpenAI: GPT-5 Mini | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | claude-opus-5-5 | openai/gpt-5-mini | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $4 / $20 | $0.25 / $2 | OpenAI: GPT-5 Mini |
| Cache Read Price (per 1M) | $0.2/1M (95% Off) | $0.125/1M (50% Off) | OpenAI: GPT-5 Mini |
| Context Window / Max Output | 1000K In / 128K Out | 391K In / 125K Out | Anthropic Claude Opus 5.5 |
| P90 First-Token / Edge Latency | 350ms | 280ms | OpenAI: GPT-5 Mini (-70ms) |
Ranked #1 on Artificial Analysis Intelligence Index (Score 58). Cuts Opus 5 pricing by 20% and features 0.05x ($0.20/1M) cache reads.
GPT-5 Mini is a compact version of GPT-5, designed to handle lighter-weight reasoning tasks. It provides the same instruction-following and safety-tuning benefits as GPT-5, but wit
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 Anthropic Claude Opus 5.5 to OpenAI: GPT-5 Mini
GPT-5 Mini is a compact version of GPT-5, designed to handle lighter-weight reasoning tasks. It provides the same instruction-following and safety-tuning benefits as GPT-5, but wit Verified P90 latency of 280ms.