xAI: Grok 4

x-ai/grok-4

Grok 4 is a xAI model that isn't ranked on the TryAii Score yet — no benchmark results on file. It lists at $3/$15 per million input/output tokens with a 256K-token context.

Prompt $/1M

$3.000

Completion $/1M

$15.000

Context

256,000 tok

Best provider

—

Specs

Model id: x-ai/grok-4
Display name: xAI: Grok 4
Modality: text+image+file->text
Tokenizer: Grok
Instruct type: —
Context length: 256,000
Max completion: —
Prompt $/1M: $3.000
Completion $/1M: $15.000
Free tier: no

Capabilities

Function callingno
JSON modeno
System promptno
Visionno
Moderatedno

Benchmark scores

Each axis is one benchmark, normalized to the best model in the field.

No benchmark data for this model.

Speed by provider

Provider	tok/s	TTFT	Total latency
No speed data.

Prompt caching by provider

Provider	Min tokens to cache	Notes
xAI	—	Automatic caching with NO published activation threshold and NO guaranteed TTL (entries may be evicted anytime — the least-documented major platform). Read discount ~75-85% provisional. Cache is per-server: always set the x-grok-conv-id header (or prompt_cache_key on the Responses API) for routing affinity, and keep conversations append-only.