Models

25 CPEN Router models.

Text-only streaming is available on the gpt-* aliases; tool calling uses standard buffered responses. Measured input and output tokens determine usage billing. There is no separate tool-call fee.

GPT

Flagship GPT-class aliases. Tool calling and text-only streaming.

cpen/luna

Luna

Paid GPT 5.6 Luna route served straight from measured upstream supply, with no free-tier fallback.

DS
DS0-DS4
Measured GPQA
87.5
Open Playground

cpen/prd/low

Production (low)

Production route on paid GPT 5.6 Luna supply, defaulting to low reasoning effort.

DS
DS0-DS4
Measured GPQA
87.5
Open Playground

cpen/gpt-5-6-luna

GPT 5.6 Luna

Tool calling and text-only streaming for high-throughput workflows.

DS
DS0-DS4
Measured GPQA
87.5
Open Playground

cpen/gpt-5-4-mini

GPT 5.4 Mini

Tool calling and text-only streaming for production workflows.

DS
DS0-DS4
Measured GPQA
78
Open Playground

Gemini

Gemini routes with Data Safety screening before dispatch.

cpen/gemini-flash-2-5

Gemini 2.5 Flash

Fast Gemini Flash route for bulk extraction, classification, and chat.

DS
DS0-DS4
Measured GPQA
70
Open Playground

cpen/gemini-3-flash

Gemini 3 Flash

Higher-accuracy Gemini Flash route for harder reasoning and generation.

DS
DS0-DS4
Measured GPQA
78
Open Playground

cpen/gemini-3-1-flash-lite

Gemini 3.1 Flash Lite

Balanced default Gemini route for fast, modern, budget-friendly production workloads.

DS
DS0-DS4
Measured GPQA
71
Open Playground

Zen

Free-tier routes. cpen/zen picks a route for you; the sub-aliases pin one.

cpen/free

Free Tier

Dynamic best-effort free route prioritized by real-time health and reliability.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground

cpen/zen

Zen Free Tier

Best-effort value route over OpenCode Zen free models reached through a rotating residential proxy. Flat reference tariff.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground

cpen/zen/mimo-v2.5-free

mimo-v2.5-free

Pinned OpenCode Zen free-model route for mimo-v2.5-free.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground

cpen/zen/muse-spark-1.3-contributor-free

muse-spark-1.3-contributor-free

Pinned OpenCode Zen free-model route for muse-spark-1.3-contributor-free.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground

cpen/zen/laguna-s-2.1-free

laguna-s-2.1-free

Pinned OpenCode Zen free-model route for laguna-s-2.1-free.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground

cpen/zen/ling-3.0-flash-free

ling-3.0-flash-free

Pinned OpenCode Zen free-model route for ling-3.0-flash-free.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground

cpen/zen/north-mini-code-free

north-mini-code-free

Pinned OpenCode Zen free-model route for north-mini-code-free.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground

cpen/zen/nemotron-3-ultra-free

nemotron-3-ultra-free

Pinned OpenCode Zen free-model route for nemotron-3-ultra-free.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground

cpen/zen/big-pickle

big-pickle

Pinned OpenCode Zen free-model route for big-pickle.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground

Stability (cpen/100)

Stability variants of the aliases above, routed for maximum success rate.

cpen/100/luna

Luna (Stability)

Reliability-first routing for the same model: only routes with current healthy evidence are eligible, ordered by observed success rate and latency before price.

DS
DS0-DS4
Measured GPQA
87.5
Open Playground

cpen/100/prd/low

Production (low) (Stability)

Reliability-first routing for the same model: only routes with current healthy evidence are eligible, ordered by observed success rate and latency before price.

DS
DS0-DS4
Measured GPQA
87.5
Open Playground

cpen/100/gpt-5-6-luna

GPT 5.6 Luna (Stability)

Reliability-first routing for the same model: only routes with current healthy evidence are eligible, ordered by observed success rate and latency before price.

DS
DS0-DS4
Measured GPQA
87.5
Open Playground

cpen/100/gpt-5-4-mini

GPT 5.4 Mini (Stability)

Reliability-first routing for the same model: only routes with current healthy evidence are eligible, ordered by observed success rate and latency before price.

DS
DS0-DS4
Measured GPQA
78
Open Playground

cpen/100/gemini-flash-2-5

Gemini 2.5 Flash (Stability)

Reliability-first routing for the same model: only routes with current healthy evidence are eligible, ordered by observed success rate and latency before price.

DS
DS0-DS4
Measured GPQA
70
Open Playground

cpen/100/gemini-3-flash

Gemini 3 Flash (Stability)

Reliability-first routing for the same model: only routes with current healthy evidence are eligible, ordered by observed success rate and latency before price.

DS
DS0-DS4
Measured GPQA
78
Open Playground

cpen/100/gemini-3-1-flash-lite

Gemini 3.1 Flash Lite (Stability)

Reliability-first routing for the same model: only routes with current healthy evidence are eligible, ordered by observed success rate and latency before price.

DS
DS0-DS4
Measured GPQA
71
Open Playground

cpen/100/free

Free Tier (Stability)

Reliability-first routing for the same model: only routes with current healthy evidence are eligible, ordered by observed success rate and latency before price.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground

cpen/100/zen

Zen Free Tier (Stability)

Reliability-first routing for the same model: only routes with current healthy evidence are eligible, ordered by observed success rate and latency before price.

DS
DS0-DS4
Measured GPQA
Not measured
Open Playground
CPEN Router — OpenAI-Compatible AI API