Thinking Machines: Inkling Small (free) vs Anthropic Claude Fable 5.1: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Thinking Machines: Inkling Small (free) (thinkingmachines/inkling-small:free) vs Anthropic Claude Fable 5.1 (claude-fable-5-1). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Thinking Machines: Inkling Small (free) (thinkingmachines/inkling-small:free) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Thinking Machines: Inkling Small (free): Activate ephemeral prefix caching to slash input costs by 50% (down to $0/1M) or route via asynchronous Batch API for 50% off standard token rates.
Anthropic Claude Fable 5.1 (claude-fable-5-1) — $25,000 Startup Credits & 97.5% 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 Thinking Machines: Inkling Small (free) (API ID: thinkingmachines/inkling-small:free) vs Anthropic Claude Fable 5.1 (API ID: claude-fable-5-1), Thinking Machines: Inkling Small (free) offers lower standard input pricing at $0/1M tokens ($0/1M output), while Thinking Machines: Inkling Small (free) leads in cached prefix economics at $0/1M tokens (50% discount). Thinking Machines: Inkling Small (free) achieves a 210ms faster P90 time-to-first-token latency (280ms vs 490ms).
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 | Thinking Machines: Inkling Small (free) | Anthropic Claude Fable 5.1 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | thinkingmachines/inkling-small:free | claude-fable-5-1 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0 / $0 | $10 / $50 | Thinking Machines: Inkling Small (free) |
| Cache Read Price (per 1M) | $0/1M (50% Off) | $0.25/1M (97.5% Off) | Thinking Machines: Inkling Small (free) |
| Context Window / Max Output | 1024K In / 256K Out | 1000K In / 128K Out | Thinking Machines: Inkling Small (free) |
| P90 First-Token / Edge Latency | 280ms | 490ms | Thinking Machines: Inkling Small (free) (-210ms) |
Thinking Machines: Inkling Small (free)
API ID: thinkingmachines/inkling-small:free • Live RegistryInkling Small is an open-weight multimodal mixture-of-experts model from Thinking Machines Lab, with 12B active parameters out of 276B total. It is positioned as the smaller, more
Anthropic specialized frontier model for demanding scientific reasoning, OfficeQA leadership, and long-horizon agentic work.
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 Thinking Machines: Inkling Small (free) to Anthropic Claude Fable 5.1
Anthropic specialized frontier model for demanding scientific reasoning, OfficeQA leadership, and long-horizon agentic work. Verified P90 latency of 490ms.