Glimmer Index
Plus $4/mo

Grok Build 0.1

xAI · Released Apr 16, 2026 · Closed weights

Fast Grok coding model tuned for agentic engineering and iterative edits

Strongest at
Reading & documents
Better than 21% of the past year's models · one benchmark so far
Price per 1M tokens
$1 / $2
input / output · xAI
Context window
256K
tokens in · 256K out
Open in the timeline

Capability profile

Scored against 91 models released in the past year. 50 is the average model; further out is better.

This modelMedian of the past year
5090Median of the past yearCoding: 29 · Better than 8%Writing: 43 · Better than 16%Reading & documents: 38 · Better than 21%Reasoning: 34 · Better than 7%Math: 23 · Better than 1%CodingWritingReadingReasoningMath
Coding29Better than 8% · 1 test
Writing43Better than 16% · 1 test
Reading & documents38Better than 21% · 1 test
Reasoning34Better than 7% · 1 test
Math23Better than 1% · 1 test

No results yet: Science, Visual reasoning, Computer use

Where these scores come from

Each capability combines the published benchmarks listed here, rescaled so 50 is the reference average and 15 points is one standard deviation. A hollow dot rests on a single benchmark.

Price against capability

The shaded corner holds anything better and cheaper. Prices blend input and output 3 to 1.

15 models from the past year score higher on Reading & documents for less: Gemini 3 Flash Preview, Qwen3.5 9B, DeepSeek V4 Pro 0813 and 12 more.

$0.1$0.3$1$3$10204060GPT-6.1 Terra: 64, $2 per 1MMuse Spark Open: 61, $2 per 1MClaude Haiku 5.5: 39, $0.2 per 1MMistral Large 4: 29, $2.06 per 1MGemini 4 Argon: 71, $4 per 1MGPT-6.1 Sol: 73, $4 per 1MClaude Sonnet 5.5: 67, $4 per 1MGPT-6 Sol: 62, $4 per 1MGPT-6 Luna: 50, $0.2 per 1MClaude Opus 5.5: 68, $8 per 1MGrok 4.7: 56, $3 per 1MDeepSeek V4.1 Flash: 60, $0.21 per 1MGPT-6 Astra: 72, $20 per 1MMuse Spark 1.3: 63, $2 per 1MGemini 3.8 Flash: 55, $1.5 per 1MClaude Fable 5.1: 71, $20 per 1MQwen3.8 Flash: 46, $0.23 per 1MGLM-5.3-Flash: 50, $0.24 per 1MDeepSeek V4 Flash Vision Exp: 33, $0.32 per 1MQwen3.8 27B: 45, $1.12 per 1MGLM-5.3: 47, $2.15 per 1MGemini 3.7 Flash: 60, $1.5 per 1MDeepSeek V4 Pro 0813: 63, $0.99 per 1MGrok 4.6: 53, $3 per 1MMuse Glimmer 30B: 47, $0.52 per 1MMuse Spark 1.2: 54, $2 per 1MQwen3.8 Max: 59, $3 per 1MDeepSeek V4 Flash 0731: 59, $0.15 per 1MClaude Opus 5: 63, $10 per 1MGemini 3.6 Flash: 50, $1.5 per 1MGemini 3.5 Flash Lite: 34, $0.85 per 1MKimi K3: 58, $6 per 1MQwen3.7 Flash: 22, $0.055 per 1MGPT-5.6 Terra: 50, $4.5 per 1MGPT-5.6 Sol: 65, $8 per 1MGPT-5.6 Luna: 44, $0.45 per 1MGrok 4.5: 49, $3 per 1MClaude Sonnet 5: 51, $4 per 1MGLM-5.2: 47, $2.15 per 1MKimi K2.7 Code: 34, $1.71 per 1MClaude Fable 5: 73, $20 per 1MQwen3.7 Plus: 38, $0.7 per 1MClaude Opus 4.8: 55, $10 per 1MQwen3.7 Max: 49, $3.75 per 1MGemini 3.5 Flash: 56, $3.38 per 1MDeepSeek V4 Pro: 51, $1.19 per 1MDeepSeek V4 Flash: 31, $0.11 per 1MGPT-5.5: 64, $11.2 per 1MQwen3.6 27B: 30, $1.35 per 1MKimi K2.6: 36, $1.71 per 1MGrok 4.3: 25, $1.56 per 1MClaude Opus 4.7: 56, $10 per 1MMuse Spark 1.1: 50, $2 per 1MQwen3.6 Plus: 40, $1.12 per 1MGLM-5V-Turbo: 39, $1.9 per 1MGPT-5.4 nano: 36, $0.46 per 1MGPT-5.4 mini: 40, $1.69 per 1MGPT-5.4: 63, $5.62 per 1MQwen3.5 9B: 64, $0.19 per 1MQwen3.5 27B: 26, $0.82 per 1MGemini 3.1 Pro Preview: 69, $4.5 per 1MClaude Sonnet 4.6: 52, $6 per 1MClaude Opus 4.6: 51, $10 per 1MGemini 3 Flash Preview: 65, $1.12 per 1MGPT-5.2 Codex: 50, $4.81 per 1MMistral Large 3: 20, $0.75 per 1MGrok Build 0.1: 38, $1.25 per 1MGrok Build 0.1Price per 1M tokens →↑ Reading & documents$0.1$1$10204060GPT-6.1 Terra: 64, $2 per 1MMuse Spark Open: 61, $2 per 1MClaude Haiku 5.5: 39, $0.2 per 1MMistral Large 4: 29, $2.06 per 1MGemini 4 Argon: 71, $4 per 1MGPT-6.1 Sol: 73, $4 per 1MClaude Sonnet 5.5: 67, $4 per 1MGPT-6 Sol: 62, $4 per 1MGPT-6 Luna: 50, $0.2 per 1MClaude Opus 5.5: 68, $8 per 1MGrok 4.7: 56, $3 per 1MDeepSeek V4.1 Flash: 60, $0.21 per 1MGPT-6 Astra: 72, $20 per 1MMuse Spark 1.3: 63, $2 per 1MGemini 3.8 Flash: 55, $1.5 per 1MClaude Fable 5.1: 71, $20 per 1MQwen3.8 Flash: 46, $0.23 per 1MGLM-5.3-Flash: 50, $0.24 per 1MDeepSeek V4 Flash Vision Exp: 33, $0.32 per 1MQwen3.8 27B: 45, $1.12 per 1MGLM-5.3: 47, $2.15 per 1MGemini 3.7 Flash: 60, $1.5 per 1MDeepSeek V4 Pro 0813: 63, $0.99 per 1MGrok 4.6: 53, $3 per 1MMuse Glimmer 30B: 47, $0.52 per 1MMuse Spark 1.2: 54, $2 per 1MQwen3.8 Max: 59, $3 per 1MDeepSeek V4 Flash 0731: 59, $0.15 per 1MClaude Opus 5: 63, $10 per 1MGemini 3.6 Flash: 50, $1.5 per 1MGemini 3.5 Flash Lite: 34, $0.85 per 1MKimi K3: 58, $6 per 1MQwen3.7 Flash: 22, $0.055 per 1MGPT-5.6 Terra: 50, $4.5 per 1MGPT-5.6 Sol: 65, $8 per 1MGPT-5.6 Luna: 44, $0.45 per 1MGrok 4.5: 49, $3 per 1MClaude Sonnet 5: 51, $4 per 1MGLM-5.2: 47, $2.15 per 1MKimi K2.7 Code: 34, $1.71 per 1MClaude Fable 5: 73, $20 per 1MQwen3.7 Plus: 38, $0.7 per 1MClaude Opus 4.8: 55, $10 per 1MQwen3.7 Max: 49, $3.75 per 1MGemini 3.5 Flash: 56, $3.38 per 1MDeepSeek V4 Pro: 51, $1.19 per 1MDeepSeek V4 Flash: 31, $0.11 per 1MGPT-5.5: 64, $11.2 per 1MQwen3.6 27B: 30, $1.35 per 1MKimi K2.6: 36, $1.71 per 1MGrok 4.3: 25, $1.56 per 1MClaude Opus 4.7: 56, $10 per 1MMuse Spark 1.1: 50, $2 per 1MQwen3.6 Plus: 40, $1.12 per 1MGLM-5V-Turbo: 39, $1.9 per 1MGPT-5.4 nano: 36, $0.46 per 1MGPT-5.4 mini: 40, $1.69 per 1MGPT-5.4: 63, $5.62 per 1MQwen3.5 9B: 64, $0.19 per 1MQwen3.5 27B: 26, $0.82 per 1MGemini 3.1 Pro Preview: 69, $4.5 per 1MClaude Sonnet 4.6: 52, $6 per 1MClaude Opus 4.6: 51, $10 per 1MGemini 3 Flash Preview: 65, $1.12 per 1MGPT-5.2 Codex: 50, $4.81 per 1MMistral Large 3: 20, $0.75 per 1MGrok Build 0.1: 38, $1.25 per 1MGrok Build 0.1Price per 1M tokens →↑ Reading & documents

OpenRouter $1 / $2 · xAI $1 / $2 · Cached input $0.2

xAI's past year

19 release days in the past year, about one every 19 days. The next is expected around Nov 10, 2026. Forecasts ↗

NovDecJanFebMarAprMayJunJulAugSepOctNov

Specifications

RELEASE DATEApr 16, 2026
WEIGHTSClosed weights
CONTEXT WINDOW256K
MAX OUTPUT256K
REASONINGNot listed
TOOL CALLINGNot listed
INPUTStext, image/jpeg, image/png, application/pdf
OUTPUTStext

Models.dev record ↗

Specifications and prices from Models.dev; availability and limits may differ by provider. Benchmarks from Epoch AI (CC BY 4.0), LiveBench and the other sources named above.