Route every call to the cheapest model that holds quality.
Fairmeter drops in front of chatbots, RAG pipelines, agent loops, and finance workloads. Cut spend 40 to 80 percent, measured on our own traffic, live in thirty seconds.
Plans start at $9.99/month.
Spend cut
Cache-hit latency
gpt-4o-mini
cheap · fast
gpt-4o
balanced
claude-opus-4-8
frontier reasoning
Drop in front of the OpenAI or Anthropic SDK you already use
Any OpenAI- or Anthropic-shaped endpoint drops in behind one base URL. Kimi and GLM are next on the roadmap.
Every call hits your top model. The bill keeps climbing and nobody can say why.
Pin one frontier model on classification, retrieval, tool calls, and cleanup alike and you pay reasoning rates for work a cheap model would nail. Then the invoice lands as one line, shipping outruns anything finance can categorise, the cost report is a guess, and the audit trail is a Slack thread.
Which team spent $14k last week?
team_id=engineering · 9,212 calls · 89% on opus
Why was this call so cheap?
complexity 2.3 · routed to gpt-4o-mini · quality held
Did we pay for this twice?
cache hit · same question, different words · $0.00
The same five-step LangChain loop, routed two ways.
The Before trace pins every step on the same top-tier reasoning model, which totals $1.84. The After trace lets the resolver pick the cheapest variant that holds the quality bar on each step, which totals $0.77 — 58 percent less for the same five steps. Every per-step price is on the page, so the arithmetic is yours to check.
Before · vanilla LangChain
one provider, one budget — every step on claude-opus-4-8 at thinking=high
claude-opus-4-8 · thinking=high
claude-opus-4-8 · thinking=high
claude-opus-4-8 · thinking=high
claude-opus-4-8 · thinking=high
claude-opus-4-8 · thinking=high
After · Fairmeter
per-step resolver, session envelope — cheapest variant that holds quality
cap:reason-heavy · gpt-5.6-terra high
cap:long-context-128k · gpt-4o
cap:tool-call-strict · gpt-4o no thinking
cap:reason-heavy · claude-opus-4-8 high
cap:cheap-fast · gpt-4o-mini
One gateway. Six superpowers.
Each one shows up on the dashboard the moment your first request lands.
State
Some tools only allow one model family. Point Claude Code, Cursor, or your own app at Fairmeter and it stays inside the family they require, routing to the right tier for each step and never leaking to another vendor. It holds the conversation too, so switching models mid-thread stays safe.
Read the docsCache
When a request matches one Fairmeter has already handled, the answer comes straight back and you are not charged for it again. Fairmeter catches exact repeats and the ones that just mean the same thing, and every team's cache stays walled off from the rest.
Read the docsRoute
Routing well is the whole product. A purpose-built classifier reads each request for true difficulty, weighs it against live cost and latency across providers, and picks the model that clears your quality bar for the least spend, with instant fallback if one slips.
Read the docsBook
Per-team budgets, per-key limits, and a four-way input, output, cached, and thinking cost split, written to the ledger and enforced before the provider call.
Read the docsSession
A session is one accountable unit. Every multi-step agent loop tracks per-turn cost, latency, tokens, and step class, and a governor caps how much thinking the session can spend.
Read the docsStep
An agent runs many steps, and most of them don't need your most expensive model. Fairmeter sizes up each one and routes it to the cheapest model that can still do it well, so you get frontier quality where it counts and pay a fraction everywhere else.
Read the docsWhat the dashboard looks like
Spend, budgets, and per-team usage on one page. Illustrative dashboard, sample data.
Operations
Live request feed, agent sessions, spend, and per-step routing for your org.
$184.31
Spend today
72.6%
Cache hit rate (24h)
49
Agent sessions (24h)
1,564 ms
P99 latency (24h)
Live feed
Cost by model (7d)
Priced so it pays for itself.
Get started in thirty seconds for $9.99/month. Scale into Team and Enterprise when the bill makes the case.
Basic
Billed monthly, cancel anytime.
One URL for every provider. Bring your own provider keys (BYOK).
Usage limit — 240 requests/min
- OpenAI, Anthropic, and Google, with one URL for all three
- Bring your own keys (BYOK)
- Semantic cache
- Email support
Team
Billed monthly, no annual plan.
Everything in Basic plus alerting, org-scoped access, and custom band maps.
Usage limit — 600 requests/min
- Everything in Basic
- Per-team budgets
- Audit log
- Per-team alerting
- Org-scoped access controls
- Custom band maps (auto, cheap, frontier)
- Priority email support
Enterprise
Custom annual contract.
On-prem deployment, SOC2 evidence pack on request, dedicated support.
Usage limit — 6,000+ requests/min
- Everything in Team
- On-prem or VPC deployment
- SOC2 evidence pack on request
- ERP integrations (on the roadmap)
- Dedicated support engineer
Three lines today. A clean bill tomorrow.
Route real traffic in under five minutes.
Plans start at $9.99/month.