tokevenGrok 4.20 Reasoning
Grok 4.20 Reasoning is Grok's balanced performance model, priced at $1.25/MTok input and $2.50/MTok output with a 1,000K context window. Backfilled on 2026-09-23. Prices confirmed by the provider pricing page and the LiteLLM cross-check. Release date not published in a machine-readable source. Not yet benchmarked, so never recommended.
Input $/MTok
$1.25
Output $/MTok
$2.50
Context window
1,000K
Cache read discount
84% off
Grok 4.20 Reasoning pricing breakdown
| Rate | Input $/MTok | Output $/MTok |
|---|---|---|
| Standard | $1.25 | $2.50 |
| Cached read (84% off input) | $0.20 | - |
| Cached write (no surcharge) | $1.25 | - |
| Batch (50% off) | $0.63 | $1.25 |
| Long context (≥200K tokens) | $2.50 | $5.00 |
All rates in USD per million tokens. Prices verified against provider documentation.
Grok 4.20 Reasoning task benchmarks
Confidence scores (0-100) and cross-provider rank for each task type. Rank 1 is best across all 72 models.
Not benchmarked. The third-party benchmark source used for confidence scores does not cover Grok models yet. Scores will appear here once independent benchmarks are published.
Grok 4.20 Reasoning cost by use case
Estimated cost per API call using default token counts for each workload.
| Use case | Input tokens | Output tokens | Cost / call |
|---|---|---|---|
| Code Generation | 2,000 | 4,000 | $0.0125 |
| Unit Test Generation | 3,000 | 5,000 | $0.0163 |
| SQL Generation | 1,500 | 1,000 | $0.004375 |
| API Generation | 3,000 | 6,000 | $0.0187 |
| Code Refactoring | 4,000 | 4,000 | $0.0150 |
| Code Review | 5,000 | 2,000 | $0.0112 |
| PR Review | 8,000 | 3,000 | $0.0175 |
| Security Review | 6,000 | 2,500 | $0.0138 |
| Bug Detection | 5,000 | 2,000 | $0.0112 |
| Document Summarization | 10,000 | 1,000 | $0.0150 |
| PDF Summarization | 15,000 | 1,500 | $0.0225 |
| Meeting Notes | 8,000 | 2,000 | $0.0150 |
Monthly cost projections
Projected monthly spend at different call volumes, using code generation as a representative workload (2,000 input / 4,000 output tokens per call).
| Calls / month | Without caching | With caching (84% read discount) |
|---|---|---|
| 1K | $12.5 | $11.03 |
| 10K | $125 | $110.3 |
| 100K | $1,250 | $1,103 |
| 500K | $6,250 | $5,515 |
| 1M | $12,500 | $11,030 |
Caching estimate assumes 70% of input tokens are cache reads. Your actual cache hit rate will depend on prompt structure and reuse.
Mid-tier alternatives to Grok 4.20 Reasoning
Same-tier models from other providers, sorted by input price.
| Model | Provider | Input $/MTok | Output $/MTok | Input savings |
|---|---|---|---|---|
| GPT 5 | GPT | $1.25 | $10.00 | Same price |
| GPT 5.1 | GPT | $1.25 | $10.00 | Same price |
| Gemini 2.5 Pro | Gemini | $1.25 | $10.00 | Same price |
| GPT 5.2 | GPT | $1.75 | $14.00 | 40% more |
| Claude Sonnet 5 | Claude | $2.00 | $10.00 | 60% more |
| GPT 5.6 Terra | GPT | $2.00 | $12.00 | 60% more |
| GPT 4.1 | GPT | $2.00 | $8.00 | 60% more |
| o3 | GPT | $2.00 | $8.00 | 60% more |
| Gemini 3.1 Pro | Gemini | $2.00 | $12.00 | 60% more |
| Gemini 3.1 Pro Custom Tools | Gemini | $2.00 | $12.00 | 60% more |
| GPT 5.4 | GPT | $2.50 | $15.00 | 100% more |
| GPT 4o | GPT | $2.50 | $10.00 | 100% more |
| Claude Sonnet 4.6 | Claude | $3.00 | $15.00 | 140% more |
Other Grok models
Grok Build 0.1
Fast / Budget / $1.00 in / $2.00 out
Grok 4.3
Mid-tier / $1.25 in / $2.50 out
Grok 4.20 Non-Reasoning
Mid-tier / $1.25 in / $2.50 out
Grok 4.20 Multi-Agent
Mid-tier / $1.25 in / $2.50 out
Grok 4.6
Flagship / $2.00 in / $6.00 out
Grok 4.5
Flagship / $2.00 in / $6.00 out
Grok 4.7
Flagship / $2.00 in / $6.00 out
Track your Grok 4.20 Reasoning spend
See exactly how much you spend on Grok 4.20 Reasoning and where you can save. Two-line wrapper install, no API keys shared.