Anthropic: Claude Fable 5 vs Upstage: Solar Mini 4: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing Anthropic: Claude Fable 5 (anthropic/claude-fable-5) vs Upstage: Solar Mini 4 (upstage/solar-mini4). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
Anthropic: Claude Fable 5 (anthropic/claude-fable-5) — $25,000 Startup Credits & 50% 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).
Upstage: Solar Mini 4 (upstage/solar-mini4) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Upstage: Solar Mini 4: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.025/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing Anthropic: Claude Fable 5 (API ID: anthropic/claude-fable-5) vs Upstage: Solar Mini 4 (API ID: upstage/solar-mini4), Upstage: Solar Mini 4 offers lower standard input pricing at $0.05/1M tokens ($0.2/1M output), while Upstage: Solar Mini 4 leads in cached prefix economics at $0.025/1M tokens (50% discount). Anthropic: Claude Fable 5 achieves a 0ms faster P90 time-to-first-token latency (280ms vs 280ms).
Auto-discovered via live global telemetry registry.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | Anthropic: Claude Fable 5 | Upstage: Solar Mini 4 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | anthropic/claude-fable-5 | upstage/solar-mini4 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $10 / $50 | $0.05 / $0.2 | Upstage: Solar Mini 4 |
| Cache Read Price (per 1M) | $5/1M (50% Off) | $0.025/1M (50% Off) | Upstage: Solar Mini 4 |
| Context Window / Max Output | 977K In / 125K Out | 512K In / 128K Out | Upstage: Solar Mini 4 |
| P90 First-Token / Edge Latency | 280ms | 280ms | Anthropic: Claude Fable 5 (-0ms) |
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning sup
Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window. It is built for agentic us
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 Fable 5 to Upstage: Solar Mini 4
Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window. It is built for agentic us Verified P90 latency of 280ms.