$0.07
USD / 1M tokensBacked by Y Combinator
Inference at the frontier of model performance.
Run open models at the lowest cost and latency, with APIs that work with your existing stack.
Launching with
GLM‑5.3‑Flash on Isoquant.
Optimized inference at the lowest prices in the market.
$0.20
USD / 1M tokensOutput tokens
$0.014
USD / 1M tokensCached input tokens
- No top-up fees.
- Automatic prompt caching.
Speed powered by frontier research.
Sources: Isoquant’s AgentX benchmark and OpenRouter · September 21, 2026.
The engineering behind Isoquant.
GPU engineering and performance optimization across the inference stack.
01 / Model
Architecture-aware optimization
Execution tuned to the architecture of each model.
- Model architecture
- Mixed precision
02 / Compute
GPU performance engineering
More useful work through kernel and memory engineering.
- Kernel optimization
- Memory optimization
03 / Decoding
Accelerated decoding
A faster path from computation to generated tokens.
- Speculative decoding
- Decode optimization
04 / Serving
Workload-aware orchestration
Serving engineered for long context and concurrent traffic.
- KV cache
- Load balancing
Keep your code. Change the endpoint.
Add your Isoquant key and update the base URL.
curl -sS "https://api.isoquant.ai/v1/chat/completions" \
-H "Authorization: Bearer $ISOQUANT_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "glm-5.3-flash",
"messages": [{"role":"user","content":"Hello!"}],
"max_tokens": 64
}'FOR COMPANIES
Self-optimizing inference, built for your evolving workload.
We continuously train, tune, and optimize models for higher quality, lower cost, and faster responses.
01 / CONNECT02 / EVALUATE & IMPROVE03 / DEPLOY WINNERS
isoquant
evalsconfigsoptimizationstrained specialists · and more
Your workload
Tasks and context.
Clear success criteria.
Your best-fit model
Built around the
outcomes that matter.
- 01 / CONNECT
Your workload
Tasks and context.
Clear success criteria. - 02 / EVALUATE & IMPROVEisoquantevalsconfigsoptimizationstrained specialists · and more
- 03 / DEPLOY WINNERS
Your best-fit model
Built around the
outcomes that matter.
Outperform frontier models at a fraction of the cost.
Models customized for your business, with quality, latency, and cost optimized around your workload.
BANKING / SPECIALIST TRAINING
An 8B specialist. Better accuracy. A fraction of the cost.
Isoquant raised banking intent accuracy from 74.7% to 91.8%, while cutting inference cost by 91.7%.
Read the case study : Banking intent classification91.7%lower inference cost
74.7% → 91.8%Intent accuracy
931 ms → 588 msMean completion latency
Coding and repair
64.4%lower inference cost
GPT-5.4 mini’s coding success, matched by Isoquant-optimized GPT-5.4 nano.
Returns-policy decisions
97.5%decision accuracy
Isoquant-optimized GPT-5.4 nano beat GPT-5.4 mini’s accuracy at 40.9% lower cost.
Multi-step order resolution
98.7%task success
Isoquant-optimized Qwen3.6-35B-A3B achieved 6.2× GPT-5.4 mini’s task success rate.