OpenAI GPT-5.6 Terra vs MythoMax 13B: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI GPT-5.6 Terra (gpt-5.6-terra) vs MythoMax 13B (gryphe/mythomax-l2-13b). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI GPT-5.6 Terra (gpt-5.6-terra) 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).
MythoMax 13B (gryphe/mythomax-l2-13b) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for MythoMax 13B: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.04/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing OpenAI GPT-5.6 Terra (API ID: gpt-5.6-terra) vs MythoMax 13B (API ID: gryphe/mythomax-l2-13b), MythoMax 13B offers lower standard input pricing at $0.08/1M tokens ($0.11/1M output), while MythoMax 13B leads in cached prefix economics at $0.04/1M tokens (50% discount). MythoMax 13B achieves a 10ms faster P90 time-to-first-token latency (280ms vs 290ms).
Enable Prompt Context Caching & Batch API to reduce repeated system prompt input token burn by 50%-97.5%.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | OpenAI GPT-5.6 Terra | MythoMax 13B | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | gpt-5.6-terra | gryphe/mythomax-l2-13b | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $2 / $12 | $0.08 / $0.11 | MythoMax 13B |
| Cache Read Price (per 1M) | $1/1M (50% Off) | $0.04/1M (50% Off) | MythoMax 13B |
| Context Window / Max Output | 400K In / 128K Out | 8K In / 4K Out | OpenAI GPT-5.6 Terra |
| P90 First-Token / Edge Latency | 290ms | 280ms | MythoMax 13B (-10ms) |
Balanced enterprise general-purpose model in the GPT-5.6 family with 1M context window.
One of the highest performing and most popular fine-tunes of Llama 2 13B, with rich descriptions and roleplay. #merge
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 OpenAI GPT-5.6 Terra to MythoMax 13B
One of the highest performing and most popular fine-tunes of Llama 2 13B, with rich descriptions and roleplay. #merge Verified P90 latency of 280ms.