Mistral AI Devstral Small vs Moonshot Kimi K1.5 Long Thinking: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Mistral AI Devstral Small (mistralai/devstral-small) vs Moonshot Kimi K1.5 Long Thinking (moonshotai/kimi-k1.5-long-thinking). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Mistral AI Devstral Small (mistralai/devstral-small) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Mistral AI Devstral Small: Activate ephemeral prefix caching to slash input costs by 90% (down to 0.01/1M) or route via asynchronous Batch API for 50% off standard token rates.
Moonshot Kimi K1.5 Long Thinking (moonshotai/kimi-k1.5-long-thinking) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Moonshot Kimi K1.5 Long Thinking: Activate ephemeral prefix caching to slash input costs by 90% (down to 0.08/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Mistral AI Devstral Small (API ID: mistralai/devstral-small) vs Moonshot Kimi K1.5 Long Thinking (API ID: moonshotai/kimi-k1.5-long-thinking), Mistral AI Devstral Small offers lower standard input pricing at $0.1/1M tokens ($0.3/1M output), while Mistral AI Devstral Small leads in cached prefix economics at $0.01/1M tokens (90% discount). Mistral AI Devstral Small achieves a 0ms faster P90 time-to-first-token latency (195ms vs 195ms).
Gateway-synced rate ($0.1/$0.3 per 1M, flat 128K window). Verify upstream provider cache TTL and regional routing before high-volume batch runs.
Gateway-synced rate ($0.8/$3.2 per 1M, flat 256K window). Verify upstream provider cache TTL and regional routing before high-volume batch runs.
| Specification / FinOps Dimension | Mistral AI Devstral Small | Moonshot Kimi K1.5 Long Thinking | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | mistralai/devstral-small | moonshotai/kimi-k1.5-long-thinking | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.1 / $0.3 | $0.8 / $3.2 | Mistral AI Devstral Small |
| Cache Read Price (per 1M) | $0.01/1M (90% Off) | $0.08/1M (90% Off) | Mistral AI Devstral Small |
| Context Window / Max Output | 128K In / 64K Out | 256K In / 64K Out | Mistral AI Devstral Small |
| P90 First-Token / Edge Latency | 195ms | 195ms | Mistral AI Devstral Small (-0ms) |
Mistral AI Devstral Small (mistralai/devstral-small): OpenRouter gateway-synced model at $0.1/1M input, $0.3/1M output, $0.01/1M cached input (128K context window).
Moonshot Kimi K1.5 Long Thinking (moonshotai/kimi-k1.5-long-thinking): OpenRouter gateway-synced model at $0.8/1M input, $3.2/1M output, $0.08/1M cached input (256K context window).
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 Mistral AI Devstral Small to Moonshot Kimi K1.5 Long Thinking
Moonshot Kimi K1.5 Long Thinking (moonshotai/kimi-k1.5-long-thinking): OpenRouter gateway-synced model at $0.8/1M input, $3.2/1M output, $0.08/1M cached input (256K context window). Verified P90 latency of 195ms.