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Grok 4.3 x-ai
Release timeline
Stages observed by the nightly radar: announced → API only → weights public → served by third parties. Each entry carries the source it was seen at.
- 2026-04-30 · API only source seeded from the earliest dated observation when first seen · observed 2026-10-07 20:20 UTC
Description
Grok 4.3 is a reasoning model from SpaceXAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...
via OpenRouter listing · observed 2026-10-24 21:26 UTC. The listing text is the provider's own description, not an assessment.
Where to run 1 providers · 4 endpoints
Hosted endpoints observed for Grok 4.3, sorted by input price (USD per million tokens). Each row names its observer and date; prices change daily, so check the source before quoting. Cheapest observed input price: $1.25/M.
| Provider | Model ref | Context | Quant | $/M in | $/M out | tok/s | TTFT | Tools | Status | Observed |
|---|---|---|---|---|---|---|---|---|---|---|
| xAI openrouter | x-ai/grok-4.3 | 977K | unknown | $1.25 | $2.50 | — | — | yes | live | 2026-10-24 |
| xAI openrouter | x-ai/grok-4.3 | 977K | unknown | $1.25 | $2.50 | — | — | yes | live | 2026-10-24 |
| xAI openrouter | x-ai/grok-4.3 | 977K | unknown | $2.50 | $5.00 | — | — | yes | live | 2026-10-24 |
| xAI openrouter | x-ai/grok-4.3 | 977K | unknown | $2.50 | $5.00 | — | — | yes | live | 2026-10-24 |
No third-party providers observed beyond the lab's own endpoints. Cache-read price $0.20/M (source, observed 2026-10-24).
Facts
| Context length | 1,000,000 tokens (977K) · OpenRouter listing |
|---|---|
| Modalities | text + image + file → text |
| Max completion tokens | 900,000 |
| Supported parameters | include_reasoning, logprobs, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, temperature, tool_choice, tools, top_logprobs, top_p |
| Openness | Closed weights · closed lab |
| Stage | API only |
| Confidence | medium |
| Pricing (USD per M tokens) |
in $1.25 · out $2.50 · cache read $0.20 OpenRouter list price (cheapest live endpoint) · source · observed 2026-10-24 21:26 UTC |
Open alternatives 5
Nearest open-weights models by modality, context and price on this watch list. Not a quality ranking.
| Model | Org | Params | Context | $/M in | License | Why it is here |
|---|---|---|---|---|---|---|
| Kimi-K3 | moonshotai | 2.78T | 1M | $0.23 | other | similar context (1.05M), cheaper input price ($0.2261/M vs $1.25/M), vision input |
| MiniMax-M3 | MiniMaxAI | 427B | 1M | $0.22 | other | similar context (1.05M), cheaper input price ($0.224/M vs $1.25/M), vision input |
| Qwen3.5-4B | Qwen | 4.66B | 256K | — | apache-2.0 | vision input |
| DeepSeek-V4.1-Flash-1017 | deepseek-ai | 763B | 1M | $0.20 | mit | similar context (1.05M), cheaper input price ($0.2/M vs $1.25/M), vision input |
| Kimi-K2.6 | moonshotai | 1.03T | 256K | $0.45 | other | cheaper input price ($0.44935/M vs $1.25/M), vision input |
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- /feeds/upcoming.json(JSON Feed 1.1) · same, JSON Feed 1.1
Email alerts are not open yet; the feeds above are the same data. See feeds for the item schema.
Sources
- openrouter x-ai/grok-4.3 · observed 2026-10-24 21:26 UTC
Radar run: 2026-10-25 06:51 UTC · Last verified 2026-10-25 06:51 UTC