Grok Build 0.1 vs Perceptron Mk1.5
Perceptron Mk1.5 costs 1.3x less per output token than Grok Build 0.1 ($1.50 vs $2.00 per million). Updated October 22, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $2.00
- Coding
- No data
- Overall
- No data
- Output $/M
- $1.50
Grok Build 0.1 or Perceptron Mk1.5: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick Grok Build 0.1 for a larger context window (256K against 37K tokens).
No benchmark has tested both yet. Grok Build 0.1 has results on AA Coding Index, Vibe Code Bench (Vals AI) and AA Intelligence Index; Perceptron Mk1.5 has none yet. Compare them on price and context instead.
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
No call
Only Grok Build 0.1 has a AA Intelligence Index result, 27.2.
Directional only
Long documents
Listed context window
Grok Build 0.1
Grok Build 0.1 takes 256K tokens against 37K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Perceptron Mk1.5
Grok Build 0.1 $0.0020, Perceptron Mk1.5 $0.0009 per turn.
List prices
At a glance
- Coding index
- Grok Build 0.1 not benchmarked, Perceptron Mk1.5 not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- Grok Build 0.1 $2.00 against Perceptron Mk1.5 $1.50 per million output tokens, 1.3x apart.
- Context window
- Grok Build 0.1 takes 256K tokens, Perceptron Mk1.5 37K.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
CodingDirectional onlySix of these boards feed the Vibe Coding Index2 boards measured
| Benchmark | Grok Build 0.1 | Perceptron Mk1.5 | 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 41 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Grok Build 0.1 | Perceptron Mk1.5 | Leader |
|---|---|---|---|
| AA Intelligence Index | 27.2 | Not measured | Only Grok Build 0.1 measured |
| Neither model has a result on the other 1 board 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
Perceptron Mk1.5 costs less
Repository review
50K input + 3K output tokens
Perceptron Mk1.5 costs less
Agent loop
200K input + 10K output tokens
Perceptron Mk1.5 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 | Perceptron Mk1.5 |
|---|---|---|
| Maker | xAI | Perceptron |
| Weights | No public weights listed | No public weights listed |
| Released | May 20, 2026 | September 25, 2026 |
| Context window | 256K | 37K |
| Input $/Mtok | $1.00 | $0.15 |
| Output $/Mtok | $2.00 | $1.50 |
| 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 Perceptron Mk1.5 for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Grok Build 0.1 for a larger context window (256K against 37K tokens).
Which is cheaper, Grok Build 0.1 or Perceptron Mk1.5?
Grok Build 0.1 costs $1.00 per million input tokens and $2.00 per million output tokens; Perceptron Mk1.5 costs $0.15 and $1.50. Cost per solved task is known for neither of them.
Which has the bigger context window, Grok Build 0.1 or Perceptron Mk1.5?
Grok Build 0.1, with 256K tokens against 37K.
Has any benchmark tested both Grok Build 0.1 and Perceptron Mk1.5?
No benchmark has tested both yet. Grok Build 0.1 has results on AA Coding Index, Vibe Code Bench (Vals AI) and AA Intelligence Index; Perceptron Mk1.5 has none yet. Compare them on price and context instead. Data as of October 22, 2026.