Grok 3 API Pricing
Grok 3 is now an archive row: historical pricing was $3/M input, $0.75/M cached input, and $15/M output. SpaceXSI's current retirement guide lists grok-3 among slugs retired on May 15, 2026.
Grok 3 API cost calculator.
Calculator pre-loaded with Grok 3's archive rates. For live traffic after May 15, 2026, SpaceXSI (formerly xAI) says the retired slug redirects to Grok 4.3 and bills at Grok 4.3 pricing.
Grok 3 cost on real workloads.
Tool-calling agent
Research pack synthesis
Power-user chat
Knowledge base RAG
This is a chars-per-token approximation, not a real tokenizer. Actual tokens vary by language, code density, and tool-call overhead — counts are typically ±10–20% off for English prose, more for code or non-Latin scripts. For exact billing, use the vendor's official tokenizer.
| Model | Input /M | Output /M | Effective blended | Context | Best for |
|---|---|---|---|---|---|
| Grok 3 Current | $3.00 cache $0.75 | $15.00 | $2.26 agentic 92/8 | 131K | Archive Grok 3 invoices |
| Grok 4.3 | $1.25 cache $0.20 | $2.50 | $0.558 −4.1× | 1M | Current Grok default |
| Gemini 3.8 Flash | $0.75 cache $0.075 | $3.75 | $0.481 −4.7× · promo | 1M | Google's pick for new projects |
| GPT-6.1 Sol | $2.00 cache $0.10 | $10.00 | $1.29 −43% | 1.05M | OpenAI's balanced model for coding and agents |
| Claude Sonnet 5.5 | $2.00 cache $0.10 | $10.00 | $1.29 −43% | 1M | Anthropic's current Sonnet |
| DeepSeek V4 Pro | $1.32 cache $0.044 | $3.96 | $0.569 −4.0× | 1M | Low-cost reasoning alternative |
Grok 3 has published scores on 2 benchmarks we track; its best placing is #97 of 105 on ARC-AGI-2. All of these scores come from independent leaderboards, not from the lab.
| Benchmark | Score | Rank | Leader | Source |
|---|---|---|---|---|
| ARC-AGI-2 Reasoning | 0% ARC Prize verified, best result | #97 of 105 | GPT-6 Astra · 95% | Official leaderboard ARC Prize Foundation |
| ARC-AGI-1 Reasoning | 5.5% ARC Prize verified, best result | #92 of 99 | 6 tied · 98.5% | Official leaderboard ARC Prize Foundation |
Grok 3 API pricing FAQ.
Grok 3 pricing questions, with SpaceXSI token rates separated from workload assumptions.
Q · 01 What was Grok 3's API price? +
$3/M input, $0.75/M cached input, and $15/M output. Use these numbers for historical billing analysis.Q · 02 Is Grok 3 still available? +
grok-3 among retired slugs. After the retirement time, requests redirect to grok-4.3 and are billed at Grok 4.3 rates.Q · 03 Does prompt caching apply? +
$0.75/M. The effective blend assumes 82% cache hits; set cache to off in the calculator for fresh-input workloads.Q · 04 Why keep an archive page? +
Q · 05 What should replace Grok 3? +
grok-4.3. SpaceXSI's live pricing page lists Grok 4.3 at $1.25/M input, $0.20/M cached input, and $2.50/M output.Q · 06 How accurate is the tokenizer estimate? +
4.875 characters per token as a planning estimate. Exact billing can vary with language, hidden reasoning, cached prompt boundaries, and tool usage.