| Service Type | Setup Fee Range | Monthly Retainer | Avg Margin | Best For |
|---|---|---|---|---|
| 💬 Chatbot / Assistant | $1,500–$5,000 | $500–$1,500/mo | 65–75% | SMBs, e-commerce, service cos |
| 📧 Email Automation | $2,000–$6,000 | $750–$2,000/mo | 60–72% | Coaches, SaaS, agencies |
| 🎯 Lead Generation Bot | $3,000–$8,000 | $1,000–$3,000/mo | 55–70% | Real estate, insurance, finance |
| ✍️ Content Automation | $2,500–$7,500 | $800–$2,500/mo | 65–80% | Content creators, media, blogs |
| 🏢 Full Office Automation | $8,000–$35,000 | $2,500–$7,500/mo | 45–65% | Mid-market, growing teams |
| ⚙️ Custom AI Agent | $5,000–$25,000 | $1,500–$5,000/mo | 50–70% | Tech cos, SaaS, operations |
| 📱 Social Media Automation | $1,500–$4,500 | $600–$1,800/mo | 70–82% | Brands, coaches, ecommerce |
* Ranges reflect 2026 US market rates. Final pricing depends on complexity, client size, and your experience level. Model strategy affects margins more than list prices: open-weight stacks (Kimi K3, GLM-5.2) cut the compute line vs. paid frontier APIs.
Google Cloud's new managed model routing (API Gateway, Public Preview since Aug 3, 2026) accepts your existing OpenAI-compatible chat requests, inspects the model name in each payload, and routes the call to a cheaper foundation model — with no client-side code changes. This estimator shows the potential token-cost savings from routing simple traffic to Gemini Flash-Lite instead of paying Flash/Pro rates for everything.
On August 3, 2026 Google Cloud added managed model routing to API Gateway (Public Preview). It accepts OpenAI-compatible chat requests, transcodes them in-flight, and dispatches them to Gemini, Anthropic Claude, or OpenAI models hosted in Vertex AI Model Garden. Google positions it as a managed replacement for self-hosted proxies like LiteLLM — no proxy server to host, scale, or maintain.
Routing is driven by the model name in each request payload. You define a router with a default model plus rules mapping client model strings to cheaper backends — unmatched traffic falls back to the default. Example: send all traffic to Flash, set the default to Flash-Lite, and route only complex/agentic requests to Flash. Google's own examples use google/gemini-3.5-flash-lite, google/gemini-2.5-pro, anthropic/claude-opus-4-7, and openai/gpt-oss-120b-maas.
Using Google's published list prices: a content agency sending 50M input + 10M output tokens/mo to Flash at $165/mo could route 80% to Flash-Lite and drop to ~$65/mo — ≈ $100/mo (~61%) saved. A multi-tier client setup on 2.5 Pro at $212.50/mo with 70% budget-tier traffic could drop to ~$100.85/mo — ≈ $111.65/mo (~53%) saved. A 5% fallback-traffic leak onto Flash-Lite instead of Flash saves ~$16/mo on that slice alone. Token volumes and split percentages are assumptions; substitute your own usage.
- Public Preview: text-only, name-based routing to MaaS models in Model Garden; request-side streaming, gRPC, WebSockets, Gemini Live, VPC-SC, and Private Service Connect unsupported.
- One-way mode: you cannot retrofit routing onto an existing gateway or remove it — switching requires a new API config + gateway.
- Single-host constraint: all models in one router must share the same hostname (global or one regional endpoint).
- Pricing gap: no model-routing-specific fee was found in the reviewed sources; confirm your exact model versions and region before quoting a client.
- No per-request observability yet: routing decisions aren't attributed per request in logs during preview.
- API Gateway — Overview of model routing (Google Cloud docs)
- API Gateway — Configure model routing (Google Cloud docs)
- Google Developers Blog — A unified API for AI model routing
- Vertex AI — Generative AI pricing (Gemini token rates)
- API Gateway pricing (per-call tiers)
- Google Cloud release notes (Aug 3, 2026)
- TLDR AI — Aug 5, 2026 issue
- API Gateway quotas and limits
2026-08-05: Added Gemini API cost & model routing savings estimator and explainer (Google Cloud managed model routing, Public Preview Aug 3, 2026). Pricing sourced from Google's published Vertex AI / API Gateway list prices; scenario figures are illustrative (directional).
Open-weight models are now a real alternative to paid frontier APIs. Moonshot's Kimi K3 — a 2.8T-parameter open-weight mixture-of-experts model (~104B active, 1M-token context, weights live on Hugging Face since July 27, 2026) — prices at $3 per 1M input tokens and $15 per 1M output tokens, a fraction of flagship paid APIs, while scoring within a few points of Claude Fable 5 and GPT-5.6 Sol on vendor-run coding benchmarks. Zhipu's GLM-5.2 (open weights, MIT license, 1M-token context) is the strongest open-source coding model on Terminal-Bench 2.1. A rumored GLM 5.3 has not been officially confirmed as of August 2026 — build on GLM-5.2 / Kimi K3 today, not on an unannounced model.
What this means for agencies: model strategy is now a pricing lever. The calculator's Model Strategy selector reflects it — open-weight stacks trim the compute line (and lift margins ~5 pts), frontier-only stacks carry a premium. Keep workflows model-portable across at least two providers, benchmark on your own workloads (vendor tables are not your client's workload), and treat AI spend as a managed line item, not a fixed cost.
Sources: Moonshot — Kimi K3 blog · Kimi K3 API pricing · HF model card — moonshotai/Kimi-K3 · zai-org/GLM-5