Microsoft Phi 3 Medium 128K Instruct vs Google Gemini 2.5 Pro: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Microsoft Phi 3 Medium 128K Instruct (microsoft/phi-3-medium-128k-instruct) vs Google Gemini 2.5 Pro (google/gemini-2.5-pro). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Microsoft Phi 3 Medium 128K Instruct (microsoft/phi-3-medium-128k-instruct) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Microsoft Phi 3 Medium 128K Instruct: 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.
Google Gemini 2.5 Pro (google/gemini-2.5-pro) — Google AI Startup Credits ($350K) & 90% Cache Promo
Google DeepMind is currently subsidizing Gemini 4 Argon at 50% off standard rates ($2.00/1M input & $10.00/1M output instead of $4/$20) until November 30, 2026, alongside 95% off Context Caching ($0.10/1M) and up to $350,000 in Google for Startups Cloud/Vertex AI credits.
In Etuki October 2026 FinOps telemetry comparing Microsoft Phi 3 Medium 128K Instruct (API ID: microsoft/phi-3-medium-128k-instruct) vs Google Gemini 2.5 Pro (API ID: google/gemini-2.5-pro), Microsoft Phi 3 Medium 128K Instruct offers lower standard input pricing at $0.1/1M tokens ($0.2/1M output), while Microsoft Phi 3 Medium 128K Instruct leads in cached prefix economics at $0.01/1M tokens (90% discount). Microsoft Phi 3 Medium 128K Instruct achieves a 0ms faster P90 time-to-first-token latency (195ms vs 195ms).
Gateway-synced rate ($0.1/$0.2 per 1M, flat 128K window). Verify upstream provider cache TTL and regional routing before high-volume batch runs.
Gateway-synced rate ($1.25/$10 per 1M, flat 1049K window). Verify upstream provider cache TTL and regional routing before high-volume batch runs.
| Specification / FinOps Dimension | Microsoft Phi 3 Medium 128K Instruct | Google Gemini 2.5 Pro | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | microsoft/phi-3-medium-128k-instruct | google/gemini-2.5-pro | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0.1 / $0.2 | $1.25 / $10 | Microsoft Phi 3 Medium 128K Instruct |
| Cache Read Price (per 1M) | $0.01/1M (90% Off) | $0.125/1M (90% Off) | Microsoft Phi 3 Medium 128K Instruct |
| Context Window / Max Output | 128K In / 64K Out | 1049K In / 64K Out | Microsoft Phi 3 Medium 128K Instruct |
| P90 First-Token / Edge Latency | 195ms | 195ms | Microsoft Phi 3 Medium 128K Instruct (-0ms) |
Microsoft Phi 3 Medium 128K Instruct
API ID: microsoft/phi-3-medium-128k-instruct • OpenRouter SyncedMicrosoft Phi 3 Medium 128K Instruct (microsoft/phi-3-medium-128k-instruct): OpenRouter gateway-synced model at $0.1/1M input, $0.2/1M output, $0.01/1M cached input (128K context window).
Google Gemini 2.5 Pro (google/gemini-2.5-pro): OpenRouter gateway-synced model at $1.25/1M input, $10/1M output, $0.125/1M cached input (1049K 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 Microsoft Phi 3 Medium 128K Instruct to Google Gemini 2.5 Pro
Google Gemini 2.5 Pro (google/gemini-2.5-pro): OpenRouter gateway-synced model at $1.25/1M input, $10/1M output, $0.125/1M cached input (1049K context window). Verified P90 latency of 195ms.