What is Grok 4 20 0309 Reasoning?
Grok 4 20 0309 Reasoning is a language model in the o10 fulfillment catalog (slug: grok-4-20-0309-reasoning).
Catalog snapshot 2026-06-27.
Grok 4 20 0309 Reasoning is listed in the o10 fulfillment catalog as of 2026-06-27. Openrouter publishes this model. o10 lists Grok 4 20 0309 Reasoning on xAI at routing band C3.
Last updated: 2026-06-27. Full catalog
Grok 4 20 0309 Reasoning — specs, hosts, and routing
AnswersSelf-contained
How much does Grok 4 20 0309 Reasoning cost per million tokens?
Grok 4 20 0309 Reasoning does not have published per-token pricing in the current gateway snapshot. See fulfillment hosts below for routing options.
Pricing unavailable in current snapshot.
Where can you run Grok 4 20 0309 Reasoning?
Grok 4 20 0309 Reasoning is configured on xAI. Each host maps to an upstream model ID listed in the fulfillment routes table. This model is routable through o10 eval-gated routing.
What is Grok 4 20 0309 Reasoning's context window?
Grok 4 20 0309 Reasoning context limits depend on the fulfillment host. Check the specifications table for endpoint-specific limits.
What o10 routing band is Grok 4 20 0309 Reasoning?
Grok 4 20 0309 Reasoning is classified at o10 routing band C3. Bands group models by cost tier and eval profile: C0 (economy), C1 (standard), C2 (capable), C3/C4 (frontier). Production routing is enabled for this slug.
Who makes Grok 4 20 0309 Reasoning?
Grok 4 20 0309 Reasoning is attributed to source provider openrouter in the o10 catalog. Fulfillment hosts (xAI) supply API access; list pricing may differ by venue.
01Deep dive
Specifications
Grok 4 20 0309 Reasoning in the o10 unified catalog.
| Field | Value |
|---|---|
| o10 slug | `grok-4-20-0309-reasoning` |
| Type | text |
| Band | C3 |
| Routable | Yes |
| Source provider | openrouter |
| Primary host | xAI |
02Deep dive
Fulfillment hosts
Upstream venues configured for Grok 4 20 0309 Reasoning.
| Host | Upstream model ID |
|---|---|
| xai | xai/grok-4.20-0309-reasoning |
03Deep dive
Routing with o10
Eval-gated model selection for this slug.
o10 slug: grok-4-20-0309-reasoning. Band: C3. Routable: yes.
See [/models/routing](/models/routing) for smart aliases (o10/auto, o10/economy) and [/kyi](/kyi) for governance.
SourceMethodology
Fulfillment catalog 2026-06-27. Gateway pricing joined where slug match exists.
FAQFrequently asked questions
Common questions
How much does Grok 4 20 0309 Reasoning cost?
Grok 4 20 0309 Reasoning has no published per-token price in the current gateway snapshot. Use the fulfillment hosts table to identify available venues.
What is Grok 4 20 0309 Reasoning's context window?
Context limits for Grok 4 20 0309 Reasoning vary by fulfillment host. See the specifications table on this page.
Which hosts serve Grok 4 20 0309 Reasoning?
Grok 4 20 0309 Reasoning (grok-4-20-0309-reasoning) is configured on: xAI. Upstream model IDs are listed in the fulfillment routes section.
Is Grok 4 20 0309 Reasoning routable through o10?
Yes. Grok 4 20 0309 Reasoning is routable at band C3. Send model: "grok-4-20-0309-reasoning" or use an o10 smart routing alias.
How do I call Grok 4 20 0309 Reasoning via o10?
Use o10 slug "grok-4-20-0309-reasoning" in the model field. See /models/routing for smart alias options (o10/auto, o10/economy).
How does o10 route this model?
o10 routes Grok 4 20 0309 Reasoning only when per-use-case evals clear at your quality floor. Band C3 indicates cost tier. See /kyi for governance and /models/routing for smart aliases.