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  • Nano Banana
  • Nano Banana 2
  • Seedream 4.0
  • 30+ AI Models

    • Grok 4.3: Built for Long Documents and Agentic Work

    xAI’s Grok 4.3 brings always-on reasoning, native video understanding, and a 1M token context window built for long-horizon agentic work and enterprise-scale deployment.

    Trusted by users from 10,000+ companies

    Additional Capabilities in Grok 4.3

    Additional Capabilities in Grok 4.3 A broader set of improvements that extend Grok 4.3's usefulness across development, research, and enterprise workflows.

    Always-on Reasoning

    Always-on Reasoning

    Reasoning is active by default on every request and cannot be disabled, ensuring consistent depth on complex and ambiguous tasks without configuration.

    Code Execution

    Code Execution

    Ships with a built-in environment that can write, run, and produce files, enabling end-to-end code workflows without external tooling.

    Agent Library

    Agent Library

    A new client-side agent library gives developers structured access to Grok 4.3's agentic capabilities for building and deploying custom workflows.

    Frequently Asked Questions

    Discover more about Grok 4.3 through common user queries online.

    Voice Cloning

    Voice Cloning

    Custom Voices, xAI's new voice cloning suite, is available alongside Grok 4.3, priced at $4.20 per million characters with natural prosody controls.

    Speech-to-Text API

    Speech-to-Text API

    Now generally available with transcription across 25 languages, batch and streaming modes, and multi-speaker diarisation with word-level speaker IDs.

    Text-to-Speech API

    Text-to-Speech API

    The same voice stack powering Grok Voice and Tesla vehicles is now accessible via API, with inline speech tags for prosody control at scale.

    Tiered Context Pricing

    Tiered Context Pricing

    Requests up to 200K tokens are billed at standard rates. Beyond that, a higher tier applies, giving teams control over cost based on actual context usage.

    OpenAI-compatible API

    OpenAI-compatible API

    Grok 4.3 is fully accessible via OpenRouter and compatible with the OpenAI SDK, making it a low-friction drop-in for existing API integrations.

    Grok Computer Integration

    Grok Computer Integration

    Tighter integration with Grok Computer which enables Grok 4.3 to take direct action on software tasks beyond the chat interface.

    Strong Benchmark Results

    Grok 4.3 sits on the Pareto frontier for intelligence versus cost, scoring higher while costing less to run than its predecessor.

    Real-world Knowledge Work

    Real-world Knowledge Work

    Grok 4.3 scores an ELO of 1500 on GDPval-AA, a 321-point jump over its predecessor. It’s ahead of multiple frontier models on the benchmark designed to measure performance on economically valuable knowledge tasks.

    Unreal Performance vs Cost

    Unreal Performance vs Cost

    Despite scoring higher on the Artificial Analysis Intelligence Index, Grok 4.3 costs around 20% less to run the full benchmark suite than Grok 4.20. More capable and cheaper to operate among top-performing competitor models.

    Sharper Factual Recall

    Sharper Factual Recall

    Grok 4.3 gains 8 points on AA-Omniscience Accuracy over Grok 4.20, reflecting a measurable improvement in factual retrieval across knowledge-intensive tasks. For legal research, technical analysis, scientific reasoning.

    Long-document Analysis at Scale
    Long-document Analysis at Scale
    Long-document Analysis at Scale
    Long-document Analysis at Scale

    Long-document Analysis at Scale

    With a 1 million token context window and no output token limit, Grok 4.3 can take in entire legal case histories, financial filings, research libraries, or large codebases in a single session.

    Long-document Analysis at Scale
    Video and Documents from a Single Workflow
    Video and Documents from a Single Workflow
    Video and Documents from a Single Workflow

    Video and Documents from a Single Workflow

    Grok 4.3 accepts text, images, and video natively, and produces downloadable PDFs, fully formatted spreadsheets, and presentation decks directly in conversation. Early testers report outputs not needing additional editing.

    Video and Documents from a Single Workflow
    Parallel Agents on Complex Tasks
    Parallel Agents on Complex Tasks
    Parallel Agents on Complex Tasks

    Parallel Agents on Complex Tasks

    For complex planning tasks, long-horizon research, or multi-part simulations, this architecture compresses timelines that would otherwise require sequential execution across hours.

    Parallel Agents on Complex Tasks