xai grok-4-1-fast-reasoning (grok-4-1-fast-reasoning)
xai grok-4-1-fast-reasoning is no longer listed: it disappeared from https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json on 2026-09-22, so no current price is shown. Last verified 2026-09-21 23:30 UTC.
Not verified since 2026-09-21T23:30:58+00:00 (the source's last fetch failed or is older than the freshness window; status ok, last attempt 2026-10-24T10:58:26+00:00). Source: https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json (community cross-check, waak source litellm). No current price is shown because this SKU is not currently verified. The last archived observations stay in the history below, each with its date.
Delisted 2026-09-22T22:14:48+00:00: this SKU disappeared from the source. Its history stays.
Price
not verified since 2026-09-21T23:30:58+00:00
No current price is shown because this SKU is not currently verified. The last archived observations stay in the history below, each with its date.
Specification
- Context window (tokens)
- 2,000,000
- Max output
- 2,000,000
- Mode
- chat
- Region
- global
- Listing
- listing not verifiable
aggregator / community mirror: no first-party public page to check against - First seen
- 2025-11-22T18:46:12+00:00
- SKU id
llm/xai/grok-4-1-fast-reasoning
Other listings of this model
Sources can disagree. The provider's own listing is first-party; LiteLLM, OpenRouter and models.dev are community cross-checks. Differences are shown, not resolved.
| SKU | Source | Input / 1M | Output / 1M | vs this page | Last verified |
|---|---|---|---|---|---|
| llm/modelsdev/302ai/grok-4-1-fast-reasoning | modelsdev (community cross-check) | 0.20 | 0.50 | – | 2026-10-24T11:44:01+00:00 |
| llm/modelsdev/azure-cognitive-services/grok-4-1-fast-reasoning | modelsdev (community cross-check) | 0.20 | 0.50 | – | 2026-10-24T11:44:01+00:00 |
| llm/modelsdev/azure/grok-4-1-fast-reasoning | modelsdev (community cross-check) | 0.20 | 0.50 | – | 2026-10-24T11:44:01+00:00 |
| llm/modelsdev/frogbot/grok-4-1-fast-reasoning | modelsdev (community cross-check) | 0.20 | 0.50 | – | 2026-10-24T11:44:01+00:00 |
| llm/modelsdev/google-vertex/xai/grok-4.1-fast-reasoning | modelsdev (community cross-check) | 0.20 | 0.50 | – | 2026-10-24T11:44:01+00:00 |
| llm/modelsdev/helicone/grok-4-1-fast-reasoning | modelsdev (community cross-check) | 0.20 | 0.50 | – | 2026-10-24T11:44:01+00:00 |
| llm/modelsdev/jiekou/grok-4-1-fast-reasoning | modelsdev (community cross-check) | 0.19 | 0.475 | – | 2026-10-24T11:44:01+00:00 |
| llm/modelsdev/llmgateway-providers/azure-ai-foundry/grok-4-1-fast-reasoning | modelsdev (community cross-check) | 0.20 | 0.50 | – | 2026-10-24T11:44:01+00:00 |
| llm/modelsdev/llmgateway/grok-4-1-fast-reasoning | modelsdev (community cross-check) | 0.20 | 0.50 | – | 2026-10-24T11:44:01+00:00 |
| llm/azure_ai/grok-4-1-fast-reasoning | litellm (community cross-check) | 0.20 | 0.50 | – | 2026-10-24T10:58:26+00:00 |
| llm/vertex_ai/xai/grok-4.1-fast-reasoning | litellm (community cross-check) | 0.20 | 0.50 | – | 2026-10-24T10:58:26+00:00 |
Price history (90 days)
| Observed (UTC) | Price | USD | EUR | Output / 1M | Snapshot |
|---|---|---|---|---|---|
| 2026-08-29T23:44:56+00:00 | USD 1.25 | 1.25 | 1.0736 | 2.50 | #273 |
| 2025-11-22T18:46:12+00:00 | USD 0.20 | 0.20 | 0.1736 | 0.50 | #179 |
Each row is a change point: the price held from that moment until the next row. Full history: JSON · CSV.
Changes
| Seen | Kind | Change |
|---|---|---|
| 2026-09-22T22:14:48+00:00 between 2026-09-21 and 2026-09-22 |
Delisted | was 1.25 USD |
| 2026-08-29T23:44:56+00:00 between 2026-08-28 and 2026-08-29 |
Price change input, per 1M tokens | 0.2 → 1.25 USD (+525.0%) |
| 2025-11-22T18:46:12+00:00 between 2025-11-16 and 2025-11-22 |
New SKU | 0.2 USD |
API: /v1/skus/llm/xai/grok-4-1-fast-reasoning
Cite this
Free to reuse under CC BY 4.0 with this credit. The numbers are list prices, not transacted prices.
InfraRabbit (2026). xai grok-4-1-fast-reasoning [data as of 2026-09-21]. https://infrarabbit.com/llm/xai/grok-4-1-fast-reasoning (accessed 2026-10-24). List prices, not transacted prices. CC BY 4.0.
BibTeX
@misc{infrarabbit_llm_xai_grok_4_1_fast_reasoning_2026,
author = {{InfraRabbit}},
title = {xai grok-4-1-fast-reasoning},
year = {2026},
howpublished = {\url{https://infrarabbit.com/llm/xai/grok-4-1-fast-reasoning}},
note = {Data as of 2026-09-21; accessed 2026-10-24; list prices, not transacted prices; CC BY 4.0}
}