Grok Build 0.1 vs Sonar Reasoning Pro
Grok Build 0.1 leads Sonar Reasoning Pro on the Artificial Analysis Intelligence Index, 27.2 to 11.8, and Grok Build 0.1 costs 4.0x less per output token ($2.00 vs $8.00 per million). Updated October 21, 2026; 1 benchmarks have a result for both.
Grok Build 0.1 or Sonar Reasoning Pro: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick Grok Build 0.1 for output tokens 4.0x cheaper ($2.00 vs $8.00 per million) and a larger context window (256K against 128K tokens).
- Shared results
- 1
- Grok Build 0.1 only
- 2
- Sonar Reasoning Pro only
- 0
- Like-for-like categories
- 1 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
Grok Build 0.1
Grok Build 0.1 leads, 27.2 against 11.8.
Same board, both measured
Long documents
Listed context window
Grok Build 0.1
Grok Build 0.1 takes 256K tokens against 128K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Grok Build 0.1
Grok Build 0.1 $0.0020, Sonar Reasoning Pro $0.0060 per turn.
List prices
At a glance
- Coding index
- Grok Build 0.1 not benchmarked, Sonar Reasoning Pro not benchmarked.
- Widest category
- Intelligence, 15.4 points apart on average over 1 shared benchmark.
- Widest single gap
- AA Intelligence Index: Grok Build 0.1 27.2 against Sonar Reasoning Pro 11.8, 15.4 points apart on a 0 to 100 scale.
- Output price
- Grok Build 0.1 $2.00 against Sonar Reasoning Pro $8.00 per million output tokens, 4.0x apart.
- Context window
- Grok Build 0.1 takes 256K tokens, Sonar Reasoning Pro 128K.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | Grok Build 0.1 | Bars | Sonar Reasoning Pro | Ties |
|---|---|---|---|---|
| Intelligence | 1 | 0 | ||
| All shared boards | 1 | 0 |
CodingDirectional onlySix of these boards feed the Vibe Coding Index2 boards, none shared
| Benchmark | Grok Build 0.1 | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| AA Coding Index | 51.5 | Not measured | Only Grok Build 0.1 measured |
| Vibe Code Bench (Vals AI) | 13.4% | Not measured | Only Grok Build 0.1 measured |
| Neither model has a result on the other 37 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Grok Build 0.1 | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| AA Intelligence Index | 27.2 | 11.8 | Grok Build 0.1 |
| Neither model has a result on the other 1 board here | |||
Agentic workNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Grok Build 0.1 | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| Neither model has a result on 41 boards here | |||
ReasoningNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Grok Build 0.1 | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| Neither model has a result on 22 boards here | |||
MathNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Grok Build 0.1 | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| Neither model has a result on 13 boards here | |||
KnowledgeNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Grok Build 0.1 | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| Neither model has a result on 18 boards here | |||
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Grok Build 0.1 | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| Neither model has a result on 9 boards here | |||
GeneralNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Grok Build 0.1 | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| Neither model has a result on 46 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Grok Build 0.1 | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Grok Build 0.1 costs less
Repository review
50K input + 3K output tokens
Grok Build 0.1 costs less
Agent loop
200K input + 10K output tokens
Grok Build 0.1 costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | SpaceXAI Grok Build 0.1 | Perplexity Sonar Reasoning Pro |
|---|---|---|
| Maker | xAI | Perplexity |
| Weights | No public weights listed | No public weights listed |
| Released | May 20, 2026 | March 7, 2025 |
| Context window | 256K | 128K |
| Input $/Mtok | $1.00 | $2.00 |
| Output $/Mtok | $2.00 | $8.00 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 1 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Grok Build 0.1 better than Sonar Reasoning Pro for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Grok Build 0.1 for output tokens 4.0x cheaper ($2.00 vs $8.00 per million) and a larger context window (256K against 128K tokens).
Which is cheaper, Grok Build 0.1 or Sonar Reasoning Pro?
Grok Build 0.1 costs $1.00 per million input tokens and $2.00 per million output tokens; Sonar Reasoning Pro costs $2.00 and $8.00. Cost per solved task is known for neither of them.
Which has the bigger context window, Grok Build 0.1 or Sonar Reasoning Pro?
Grok Build 0.1, with 256K tokens against 128K.
How many benchmarks is the Grok Build 0.1 vs Sonar Reasoning Pro comparison based on?
1 benchmarks have a result for both models as of October 21, 2026. Grok Build 0.1's coding index rests on 1 independent benchmark and Sonar Reasoning Pro's on 0. Where only one model has a result, the page says so instead of naming a winner.