{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/grok-4-3/","md":"https://postcutoff.com/m/grok-4-3/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"grok-4-3","name":"Grok 4.3","org":"xAI","family":"Grok 4","released":"2026-04","status":"current","type":"reasoning-llm","modality_in":["text","image"],"modality_out":["text"],"open_weights":false,"model_license":"proprietary","context_window":1000000,"max_output":null,"knowledge_cutoff":null,"pricing":{"input":1.25,"cached_input":0.2,"output":2.5,"input_over_200k":2.5,"output_over_200k":5,"unit":"per 1M tokens (USD); Batch API 20% off","source":"https://docs.x.ai/docs/models"},"price_line":"$1.25 in, $2.50 out per 1M tokens","access":[{"provider":"xAI API","model_id":"grok-4.3","endpoint":"https://api.x.ai/v1/chat/completions","docs":"https://docs.x.ai/docs/models/grok-4.3"},{"provider":"AWS Bedrock","model_id":"xai.grok-4.3","docs":"https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-xai-grok-4-3.html"},{"provider":"OpenRouter","model_id":"x-ai/grok-4.3","url":"https://openrouter.ai/x-ai/grok-4.3"},{"provider":"Web app","url":"https://grok.com"}],"capabilities":[{"name":"1M context at budget price","detail":"1M-token context window at $1.25/$2.50, cheaper than the 500K-context Grok 4.5-4.7 line.","first":false,"discovered":"launch","source":"https://docs.x.ai/docs/models/grok-4.3"},{"name":"Reasoning effort incl. none","detail":"Reasoning effort none / low / medium / high / xhigh, default low - usable as a fast non-reasoning model.","first":false,"discovered":"launch","source":"https://docs.x.ai/docs/models/grok-4.3"}],"entry":null,"notes":"Alias grok-4.3-latest. Cheaper long-context option still offered alongside Grok 4.7. Release month inferred from OpenRouter listing date (2026-04-30); exact date not verified.","verified":"2026-09-29","body_md":"Cost-efficient 1M-context Grok for long documents and high-volume agents.\n\n```bash\ncurl https://api.x.ai/v1/chat/completions -H \"Authorization: Bearer $XAI_API_KEY\" -H \"Content-Type: application/json\" \\\n -d '{\"model\":\"grok-4.3\",\"messages\":[{\"role\":\"user\",\"content\":\"Hello\"}]}'\n```\n\nSources: https://docs.x.ai/docs/models , https://docs.x.ai/docs/models/grok-4.3","page_url":"https://postcutoff.com/m/grok-4-3/","events_after":null,"major_after":null,"historic_after":null,"missing_at_launch":null,"events_since_release":1863,"you_url":"https://postcutoff.com/you/grok-4-3/","briefings":null}