OpenAI: GPT-6 Sol vs StepFun: Step 5 Preview: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI: GPT-6 Sol (openai/gpt-6-sol) vs StepFun: Step 5 Preview (stepfun/step-5-preview). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI: GPT-6 Sol (openai/gpt-6-sol) 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).
StepFun: Step 5 Preview (stepfun/step-5-preview) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for StepFun: Step 5 Preview: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.5/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing OpenAI: GPT-6 Sol (API ID: openai/gpt-6-sol) vs StepFun: Step 5 Preview (API ID: stepfun/step-5-preview), StepFun: Step 5 Preview offers lower standard input pricing at $1/1M tokens ($2.7/1M output), while StepFun: Step 5 Preview leads in cached prefix economics at $0.5/1M tokens (50% discount). OpenAI: GPT-6 Sol 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 | OpenAI: GPT-6 Sol | StepFun: Step 5 Preview | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openai/gpt-6-sol | stepfun/step-5-preview | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $2 / $10 | $1 / $2.7 | StepFun: Step 5 Preview |
| Cache Read Price (per 1M) | $1/1M (50% Off) | $0.5/1M (50% Off) | StepFun: Step 5 Preview |
| Context Window / Max Output | 1025K In / 125K Out | 1024K In / 63K Out | OpenAI: GPT-6 Sol |
| P90 First-Token / Edge Latency | 280ms | 280ms | OpenAI: GPT-6 Sol (-0ms) |
GPT-6 Sol is the cost-efficient high-end model in OpenAI's GPT-6 series, positioned below the flagship GPT-6 Astra and above the fast GPT-6 Luna tier. It is suited for demanding pr
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in softwar
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-6 Sol to StepFun: Step 5 Preview
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in softwar Verified P90 latency of 280ms.