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SpaceXAI: Grok 4.3

x-ai/grok-4-3
CompareAPITry this model

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

Modalities
In / out per 1M$1.25 / $2.50
Context1M
ReleasedApr 30, 2026

Providers

4 providers serve this model upstream.

Providers serving this model
ProviderInput /MOutput /MCache read /MLatency P50Throughput P50Uptime
SpaceXAI$2.50$5.00$0.400.53s57 tps100%
SpaceXAI$2.50$5.00$0.40——100%
SpaceXAI$1.25$2.50$0.201.37s69 tps98.34%
SpaceXAI$1.25$2.50$0.201.26s68 tps97.47%

Market-wide measurements, refreshed every 15 minutes. They describe who serves Grok 4.3 in general, not how ProjectCOZY routes your requests.

Pricing

List rates per 1M tokens — what Grok 4.3 costs pay-as-you-go elsewhere, not what you pay here.

Input
$1.25
per 1M tokens
Output
$2.50
per 1M tokens
Cache read
$0.20
per 1M cached tokens
Included in every pass
Grok 4.3 is included in every ProjectCOZY pass at no extra cost — one flat rate, no per-token metering. The rates above are there for comparison.

Performance

Time to first token and output speed across every provider, over the last 3 days.

0.0s2.0s4.0s6.0s8.0s
Oct 29, 12 AMOct 29, 8 AMOct 29, 4 PMOct 30, 12 AMOct 30, 8 AMOct 30, 4 PMOct 31, 12 AMOct 31, 8 AMOct 31, 4 PMNov 1, 12 AMNov 1, 8 AM
SpaceXAI SpaceXAI SpaceXAI SpaceXAI
0 tok/s100 tok/s200 tok/s300 tok/s400 tok/s
Oct 29, 12 AMOct 29, 8 AMOct 29, 4 PMOct 30, 12 AMOct 30, 8 AMOct 30, 4 PMOct 31, 12 AMOct 31, 8 AMOct 31, 4 PMNov 1, 12 AMNov 1, 8 AM
SpaceXAI SpaceXAI SpaceXAI

Uptime

100% of requests were served successfully over the last 3 days, across all providers.

Last 3 daysAvailability 99.31%
Oct 29, 6:00 PMNow
Availability over the last 24 hoursAvailability 99.45%
100% 86% 73% 60%
Oct 31, 6:10 PMNow

Apps

Tools that most often run Grok 4.3, by tokens this week.

HeyFans42.7% of tokens7.4BOpenClawPersonal Agent · 20.2% of tokens3.5BAiDetector13.8% of tokens2.4BHermes AgentPersonal Agent · 12.4% of tokens2.1BISEKAI ZEROGame · 10.9% of tokens1.9B

Activity

166.8B tokens processed market-wide in the last month.

02.0B4.0B6.0B8.0B
Oct 2Oct 7Oct 12Oct 17Oct 22Oct 27Nov 1
Tokens

FAQ

Which model id do I use for Grok 4.3?
x-ai/grok-4.3. Send it as the model field from any OpenAI-compatible client, against https://minuykh.app/v1.
How much context does Grok 4.3 hold?
1,000,000 tokens per request, of which up to 900,000 can be the response.
What can it accept and return?
Input: text, image, file. Output: text.
What does Grok 4.3 cost on a pass?
Nothing beyond the pass itself. Pay-as-you-go elsewhere it lists at $1.25 per 1M input tokens and $2.50 per 1M output tokens.
Who built Grok 4.3?
SpaceXAI, in the Grok family.

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