Model comparison

grok-4-1-fast-reasoning vs grok-4-20-non-reasoning

Compare grok-4-1-fast-reasoning (X Ai) and grok-4-20-non-reasoning (X Ai) by price, context, capabilities, and latency.

Estimate costAll comparisons

Which should you pick?

  • Price: grok-4-1-fast-reasoning is cheaper ($0.2 / 1M tokens input / $0.5 / 1M tokens output) vs grok-4-20-non-reasoning ($1.25 / 1M tokens input / $2.50 / 1M tokens output).
  • Context: grok-4-1-fast-reasoning has the larger context window (2M tokens).

Side by side

grok-4-1-fast-reasoning vs grok-4-20-non-reasoning — full comparison

Compare price, provider, context, capabilities, latency, and source basis.

ModelProviderInputOutputContextCapabilitiesBest forLatencyStatusSource
grok-4-1-fast-reasoningx-ai/grok-4.1-fast-reasoningX Ai$0.2 / 1M tokens$0.5 / 1M tokens2M
Streaming
General chat via X Ai, API workloads1684-3916msCatalogPlatform curated
grok-4-20-non-reasoningx-ai/grok-4.20-non-reasoningX Ai$1.25 / 1M tokens$2.50 / 1M tokens256k
Streaming
General chat via X Ai, API workloads1084-4110msCatalogPlatform curated

FAQ

grok-4-1-fast-reasoning vs grok-4-20-non-reasoning FAQ

Is grok-4-1-fast-reasoning or grok-4-20-non-reasoning cheaper?

grok-4-1-fast-reasoning is cheaper ($0.2 / 1M tokens input / $0.5 / 1M tokens output) vs grok-4-20-non-reasoning ($1.25 / 1M tokens input / $2.50 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.

Which has a larger context window, grok-4-1-fast-reasoning or grok-4-20-non-reasoning?

grok-4-1-fast-reasoning is larger (2M tokens) vs 256k tokens.

grok-4-1-fast-reasoning vs grok-4-20-non-reasoning for High quality: which should I pick?

Both target High quality. Pick grok-4-1-fast-reasoning to optimize cost, or grok-4-1-fast-reasoning for the longer context window. Test both on real prompts before committing production traffic.

grok-4-1-fast-reasoning detailsgrok-4-20-non-reasoning detailsPricing calculatorOpenAI-compatible quickstart