TokenMix Research Lab · 2026-04-03
Grok API Pricing in 2026: Every Model, Free Credits, and How Grok 4.1 Undercuts GPT-5.4 by 90%
Last Updated: 2026-04-29
Author: TokenMix Research Lab
Grok 4.1 Fast at $0.20/$0.50, Grok 4.20 flagship at $2/$6 — 60% cheaper output than GPT-5.4 and Claude Sonnet ($15/M). Every Grok model ships with a 2M token context window, the largest in the industry. New accounts get $25 + $150/month data-sharing credits.
xAI's Grok API is one of the most aggressively priced in 2026. Grok 4.1 Fast costs $0.20/M input — matching DeepSeek V4 territory — while offering a 2-million-token context window that no other model at this price point can touch. The flagship Grok 4.20 sits at $2.00/$6.00, undercutting GPT-5.4 on output by 60%. New accounts get $25 in free credits, plus an optional $150/month through data sharing. This guide covers every Grok model's real cost, benchmarks them against GPT-5.4, Claude, and DeepSeek, and shows exactly when Grok's pricing advantage translates to real savings. All data verified against xAI's official docs and tracked by TokenMix.ai as of April 2026.
Table of Contents
- Quick Grok API Pricing Overview
- Grok 4.1 Fast: The $0.20/M Budget Killer with 2M Context
- Grok 4.20: Flagship at $2/$6 — 60% Cheaper Output Than GPT-5.4
- Free Credits: $25 Signup + $150/Month Data Sharing
- Grok API Pricing vs GPT-5.4 vs Claude vs DeepSeek
- Real-World Grok API Cost Scenarios
- Grok Benchmark Performance: Is Cheaper Also Good Enough?
- How to Choose the Right Grok Model
- Conclusion
- FAQ
Quick Grok API Pricing Overview
Two main tiers: Grok 4.1 Fast at $0.20/$0.50 (with reasoning toggle), Grok 4.20 flagship at $2/$6 — every variant ships with 2M token context, no long-context surcharge at any size.
All prices per 1M tokens, xAI direct API, April 2026:
| Model | Input | Cached Input | Output | Context | Best For |
|---|---|---|---|---|---|
| Grok 4.1 Fast Reasoning | $0.20 | $0.05 | $0.50 | 2M | Budget production, agents |
| Grok 4.1 Fast Non-Reasoning | $0.20 | $0.05 | $0.50 | 2M | Simple tasks, high volume |
| Grok 4.20 Reasoning | $2.00 | $0.20 | $6.00 | 2M | Flagship quality |
| Grok 4.20 Non-Reasoning | $2.00 | $0.20 | $6.00 | 2M | Fast flagship, no CoT |
| Grok 4.20 Multi-Agent | $2.00 | $0.20 | $6.00 | 2M | Multi-agent orchestration |
Image & Video generation:
- Grok Imagine Image Pro: $0.07/image
- Grok Imagine Image: $0.02/image
- Grok Imagine Video: $0.05/second
The headline: Every Grok model has a 2M token context window — the largest in the industry at any price point. GPT-5.4 offers 1.1M. Claude offers 1M. Grok doubles them both.
Grok 4.1 Fast: The $0.20/M Budget Killer with 2M Context
Grok 4.1 Fast ties GPT-5.4 Nano on input ($0.20/M), beats it 2.5× on output ($0.50 vs $1.25), beats DeepSeek V4 by 33% on input — plus a 2M context window 5× larger than Nano's. Grok 4.1 Fast is xAI's answer to DeepSeek V4 and GPT-5.4 Nano — budget pricing with flagship-tier context.
| Spec | Grok 4.1 Fast | DeepSeek V4 | GPT-5.4 Nano |
|---|---|---|---|
| Input/M | $0.20 | $0.30 | $0.20 |
| Output/M | $0.50 | $0.50 | $1.25 |
| Cached Input/M | $0.05 | $0.03 | $0.02 |
| Context Window | 2M | 1M | 400K |
| Reasoning mode | Yes | No | No |
Grok 4.1 Fast ties GPT Nano on input, beats it 2.5x on output, and has 5x the context window. It also offers a reasoning mode toggle — something neither DeepSeek V4 nor GPT Nano has at this price.
Against DeepSeek V4: Grok is 33% cheaper on input ($0.20 vs $0.30), identical on output ($0.50), and has double the context (2M vs 1M). DeepSeek's cache hit is cheaper ($0.03 vs $0.05), but for everything else Grok wins.
Best for: Agent workflows that need massive context at budget pricing. The 2M window handles entire codebases without chunking.
Grok 4.20: Flagship at $2/$6 — 60% Cheaper Output Than GPT-5.4
Grok 4.20 output at $6/M is 60% cheaper than GPT-5.4 ($15) and Claude Sonnet 4.6 ($15) — combined with Mistral Large 3 ($2/$6), the $15/M flagship-output standard set by OpenAI/Anthropic is no longer the floor. Grok 4.20 is xAI's premium model, released March 2026. The standout metric is output pricing.
| Spec | Grok 4.20 | GPT-5.4 | Claude Sonnet 4.6 | Gemini 3.1 Pro |
|---|---|---|---|---|
| Input/M | $2.00 | $2.50 | $3.00 | $2.00 |
| Output/M | $6.00 | $15.00 | $15.00 | $12.00 |
| Cached Input/M | $0.20 | $0.25 | $0.30 | $0.50 |
| Context | 2M | 1.1M | 1M | 1M |
Grok 4.20 output is 60% cheaper than GPT-5.4 and Claude Sonnet ($6 vs $15). For output-heavy workloads — content generation, code writing, detailed analysis — this is the single biggest price difference among flagship models.
Combined with Mistral Large 3 ($2/$6 output), Grok 4.20 proves that the $15/M output standard set by OpenAI and Anthropic is no longer the floor for frontier-quality models.
TokenMix.ai tracks these cross-provider pricing gaps in real time — check tokenmix.ai/pricing for the latest rates.
Free Credits: $25 Signup + $150/Month Data Sharing
xAI offers $25 signup credits (no credit card needed) plus $150/month for opting into data sharing — the most generous recurring credit in the API market, effectively free for small workloads. xAI offers two free credit programs:
| Program | Amount | Requirement |
|---|---|---|
| Signup bonus | $25 | New account, no credit card needed |
| Data sharing | $150/month | Opt into usage data sharing |
$25 in free credits gets you roughly:
- 125M tokens of Grok 4.1 Fast input
- 12.5M tokens of Grok 4.20 input
- Enough for several weeks of prototyping
$150/month data sharing is the most generous recurring credit in the API market. If you're not handling sensitive data, this effectively makes Grok free for small-to-medium workloads.
Grok API Pricing vs GPT-5.4 vs Claude vs DeepSeek
Cross-provider summary: Grok 4.20 wins flagship output pricing (60% below GPT/Claude); Grok 4.1 Fast wins budget input vs DeepSeek (-33%) with 2× the context. Only DeepSeek's $0.03 cache hit beats Grok's $0.05.
Full flagship comparison, per 1M tokens, April 2026:
| Model | Input | Output | Cache Hit | Context | Batch Output |
|---|---|---|---|---|---|
| Grok 4.1 Fast | $0.20 | $0.50 | $0.05 | 2M | $0.25 |
| Grok 4.20 | $2.00 | $6.00 | $0.20 | 2M | $3.00 |
| GPT-5.4 | $2.50 | $15.00 | $0.25 | 1.1M | $7.50 |
| GPT-5.4 Mini | $0.75 | $4.50 | $0.075 | 400K | $2.25 |
| Claude Sonnet 4.6 | $3.00 | $15.00 | $0.30 | 1M | $7.50 |
| Claude Opus 4.6 | $5.00 | $25.00 | $0.50 | 1M | $12.50 |
| DeepSeek V4 | $0.30 | $0.50 | $0.03 | 1M | N/A |
Key pricing insights from TokenMix.ai:
Grok 4.20 vs GPT-5.4: 20% cheaper input, 60% cheaper output. Grok wins decisively on cost for output-heavy tasks. Plus 2M context vs 1.1M.
Grok 4.1 Fast vs DeepSeek V4: Grok is 33% cheaper on input, identical on output, 2x the context. The budget tier winner depends on cache patterns — DeepSeek's $0.03 cache is cheaper than Grok's $0.05.
Grok 4.1 Fast vs GPT-5.4 Mini: Grok is 73% cheaper on input ($0.20 vs $0.75) and 89% cheaper on output ($0.50 vs $4.50). This is a massive gap at the mid-tier.
Context window dominance: Every Grok model has 2M tokens. No other provider offers this at any price point.
Real-World Grok API Cost Scenarios
Three workloads: chatbot 500 conv/day → $3.72 on Grok 4.1 Fast (cheapest, beats DeepSeek by 9%); code SaaS 5K calls/day → $990 cached on Grok 4.20 ($1,073/mo savings vs GPT-5.4); 500K-token docs → $1.00/doc on Grok (no surcharge).
Scenario 1: Startup chatbot — 500 conversations/day
- Average: 800 input + 400 output tokens per conversation
- Monthly: ~12M input, ~6M output tokens
- Cache hit rate: 70%
| Model | Monthly Cost (Cached) |
|---|---|
| Grok 4.1 Fast | $3.72 |
| DeepSeek V4 | $4.10 |
| GPT-5.4 Nano | $7.98 |
| Claude Haiku 4.5 | $15.60 |
Grok 4.1 Fast is the cheapest option — even beating DeepSeek V4 by 9%.
Scenario 2: Code generation SaaS — 5,000 calls/day
- Average: 3,000 input + 2,000 output tokens per call (output-heavy)
- Monthly: ~450M input, ~300M output tokens
- Cache hit rate: 75%
| Model | Standard | Cached |
|---|---|---|
| Grok 4.20 | $2,700 | $990 |
| GPT-5.4 | $5,625 | $2,063 |
| Claude Sonnet 4.6 | $5,850 | $2,138 |
| DeepSeek V4 | $285 | $140 |
Grok 4.20 saves $1,073/month vs GPT-5.4 with caching — the output price advantage compounds at scale. DeepSeek remains cheapest overall.
Scenario 3: Enterprise document processing — long context
- 1,000 documents/day, average 500K tokens each (needs >1M context)
- Only models with >1M context qualify
| Model | Context | Can Handle 500K? | Input Cost/doc |
|---|---|---|---|
| Grok 4.20 | 2M | Yes | $1.00 |
| GPT-5.4 | 1.1M | Yes (with 2x surcharge) | $2.50* |
| Claude Opus 4.6 | 1M | Yes | $2.50 |
| DeepSeek V4 | 1M | Yes | $0.15 |
*GPT-5.4 hits 2x surcharge at 272K. Grok has no surcharge at any context length.
Grok Benchmark Performance: Is Cheaper Also Good Enough?
Grok 4.20 sits 2-3 points behind GPT-5.4 and Claude Opus on SWE-bench (~78% vs 80-80.8%) — close enough for most production. Grok 4.1 Fast at ~70% trails meaningfully and is best for volume work, not quality-critical tasks. Price means nothing if quality is insufficient. Here's where Grok models stand:
| Benchmark | Grok 4.20 | Grok 4.1 Fast | GPT-5.4 | Claude Opus 4.6 | DeepSeek V4 |
|---|---|---|---|---|---|
| SWE-bench | ~78% | ~70% | 80% | 80.8% | 81% |
| MMLU | ~88% | ~82% | 90% | 89% | 88% |
| Coding (Arena) | Top 5 | Mid-tier | Top 3 | Top 2 | Top 5 |
Grok 4.20 is competitive but not leading. It sits 2-3 points behind GPT-5.4 and Claude Opus on SWE-bench. For most production tasks, this gap is negligible. For cutting-edge coding and reasoning, Claude Opus still leads.
Grok 4.1 Fast is noticeably weaker. ~70% SWE-bench puts it closer to GPT-4o level than GPT-5.4 level. Use it for simple tasks where the price advantage justifies the quality trade-off.
Which Grok Model Should You Pick?
Pick Grok 4.1 Fast for budget agents needing 2M context, Grok 4.20 for output-heavy generation (60% cheaper output than GPT/Claude), Claude Opus 4.6 if you need the last 2-3 SWE-bench points. Free credits make Grok the right prototype default.
| Your Situation | Recommended Model | Why |
|---|---|---|
| Budget production, simple tasks | Grok 4.1 Fast ($0.20/$0.50) | Cheapest with 2M context |
| Output-heavy generation | Grok 4.20 ($2/$6) | 60% cheaper output than GPT/Claude |
| Need >1M context, no surcharge | Any Grok model | All have 2M flat pricing |
| Maximum quality, cost secondary | Claude Opus 4.6 | Still leads on benchmarks |
| Cost is everything | DeepSeek V4 | Cheapest overall, but only 1M context |
| Multi-model with auto-failover | Grok via TokenMix.ai | Unified API, route to cheapest available |
| Free prototyping | Grok ($25 free credits) | Most generous signup credits in the market |
Related: Compare all model pricing in our complete LLM API pricing comparison
What's the Bottom Line on Grok Pricing?
Grok delivers the cheapest flagship output ($6/M) and the largest context (2M everywhere) — saves 40-60% on output-heavy workloads vs OpenAI and Anthropic. Quality is 2-3 points behind leaders but $25 + $150/month free credits make it the right default for prototyping. Grok's pricing in 2026 is built around two advantages: the cheapest flagship output ($6/M vs $15/M from GPT and Claude) and the largest context window at every price tier (2M tokens across the board). For output-heavy workloads and long-context processing, Grok offers genuine savings of 40-60% compared to OpenAI and Anthropic.
The quality gap is real but narrowing. Grok 4.20 sits 2-3 points behind the leaders on SWE-bench, which is negligible for most production tasks. Grok 4.1 Fast is a tier below — use it for volume work, not quality-critical tasks.
The $25 signup credits and $150/month data sharing program make Grok effectively free for small teams. No other provider matches this generosity.
Compare Grok pricing against 155+ models in real time at tokenmix.ai/models.
FAQ
How much does the Grok API cost?
Grok 4.1 Fast costs $0.20/M input and $0.50/M output — one of the cheapest APIs available. Grok 4.20 flagship costs $2.00/M input and $6.00/M output. All models include a 2M token context window at no surcharge.
Is Grok API cheaper than GPT-5.4?
Yes, significantly. Grok 4.20 output ($6/M) is 60% cheaper than GPT-5.4 ($15/M). Grok 4.1 Fast ($0.20/$0.50) is 73-89% cheaper than GPT-5.4 Mini ($0.75/$4.50) across all dimensions.
Does Grok have free API credits?
Yes. New accounts receive $25 in free credits with no credit card required. An additional $150/month is available by opting into the data sharing program — the most generous recurring credit in the API market.
What is Grok's context window size?
2 million tokens across every model — the largest in the industry. GPT-5.4 offers 1.1M, Claude and DeepSeek offer 1M. Grok charges flat pricing with no long-context surcharge.
How does Grok compare to DeepSeek V4?
Grok 4.1 Fast is 33% cheaper on input ($0.20 vs $0.30) and identical on output ($0.50). Grok has 2x the context (2M vs 1M). DeepSeek has cheaper cache hits ($0.03 vs $0.05) and slightly higher benchmark scores.
Is Grok good enough for production?
Grok 4.20 is competitive with GPT-5.4 and Claude Sonnet for most production tasks. It's 2-3 points behind on SWE-bench but offers better pricing and larger context. Grok 4.1 Fast is best suited for simpler tasks — not recommended for quality-critical coding.
Author: TokenMix Research Lab | Last Updated: April 2026 | Data Source: xAI Official Pricing, TokenMix.ai, and Artificial Analysis