Documentation 2026-07-04 20:00 UTC to 2026-07-08 18:58 UTC

70 70 

71You can also switch inside the TUI with `/model <name>`.71You can also switch inside the TUI with `/model <name>`.

72 72 

73## Use Grok Build 0.1 on the API73## Use Grok 4.5 on the API

74 74 

75The same model that powers Grok Build, [`grok-build-0.1`](/developers/models/grok-build-0.1), is also available directly on the xAI API in early access. Drop it into your own agent loop, IDE integration, or coding tool.75The same model that powers Grok Build, [`grok-4.5`](/developers/models/grok-4.5), is also available directly on the xAI API. Drop it into your own agent loop, IDE integration, or coding tool.

76 76 

77```bash customLanguage="bash"77```bash customLanguage="bash"

78curl https://api.x.ai/v1/responses \78curl https://api.x.ai/v1/responses \

79 -H "Authorization: Bearer $XAI_API_KEY" \79 -H "Authorization: Bearer $XAI_API_KEY" \

80 -H "Content-Type: application/json" \80 -H "Content-Type: application/json" \

81 -d '{81 -d '{

82 "model": "grok-build-0.1",82 "model": "grok-4.5",

83 "input": "Fix this function and explain the bug: function median(a){a.sort();return a[a.length/2]}"83 "input": "Fix this function and explain the bug: function median(a){a.sort();return a[a.length/2]}"

84 }'84 }'

85```85```

91 91 

92client = Client(api_key=os.getenv("XAI_API_KEY"))92client = Client(api_key=os.getenv("XAI_API_KEY"))

93 93 

94chat = client.chat.create(model="grok-build-0.1")94chat = client.chat.create(model="grok-4.5")

95chat.append(user("Fix this function and explain the bug: function median(a){a.sort();return a[a.length/2]}"))95chat.append(user("Fix this function and explain the bug: function median(a){a.sort();return a[a.length/2]}"))

96 96 

97print(chat.sample().content)97print(chat.sample().content)

106)106)

107 107 

108response = client.responses.create(108response = client.responses.create(

109 model="grok-build-0.1",109 model="grok-4.5",

110 input="Fix this function and explain the bug: function median(a){a.sort();return a[a.length/2]}",110 input="Fix this function and explain the bug: function median(a){a.sort();return a[a.length/2]}",

111)111)

112 112 

118import { generateText } from 'ai';118import { generateText } from 'ai';

119 119 

120const { text } = await generateText({120const { text } = await generateText({

121 model: xai.responses('grok-build-0.1'),121 model: xai.responses('grok-4.5'),

122 prompt: 'Fix this function and explain the bug: function median(a){a.sort();return a[a.length/2]}',122 prompt: 'Fix this function and explain the bug: function median(a){a.sort();return a[a.length/2]}',

123});123});

124 124 

33```toml customLanguage="toml"33```toml customLanguage="toml"

34[models]34[models]

35default = "grok-build" # recommended for coding / agent sessions35default = "grok-build" # recommended for coding / agent sessions

36web_search = "grok-4.3" # model used by client-side web_search tool36web_search = "grok-4.5" # model used by client-side web_search tool

37 37 

38[model."grok-4.3"]38[model."grok-4.5"]

39model = "grok-4.3" # id sent to the API39model = "grok-4.5" # id sent to the API

40base_url = "https://api.x.ai/v1" # provider endpoint40base_url = "https://api.x.ai/v1" # provider endpoint

41name = "Grok 4.3" # shown in model picker41name = "Grok 4.5" # shown in model picker

42description = "Grok 4.3 from xAI"42description = "Grok 4.5 from xAI"

43env_key = "XAI_API_KEY" # env var holding the API key43env_key = "XAI_API_KEY" # env var holding the API key

44api_backend = "responses" # chat_completions | responses | messages44api_backend = "responses" # chat_completions | responses | messages

45temperature = 0.745temperature = 0.7