> ## Documentation Index > Fetch the complete documentation index at: https://apixo.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Claude API Gateway: Models, Pricing & Code > Integrate eight Claude models through APIXO's Anthropic-compatible Messages API gateway. Compare pricing and use copy-ready cURL, JavaScript, Python, or MCP instructions. Use one Anthropic Messages-compatible integration for all eight Claude models available through APIXO. Configure the APIXO base URL and API key once, then switch models by changing only the `model` value. This page includes the complete APIXO Claude model and pricing snapshot verified on August 3, 2026. Model availability and pricing can change, so check the [APIXO Claude model page](https://apixo.ai/models/llm/claude) before making billing-sensitive decisions. **Choose your integration path:** [Use the Quickstart](#quickstart) to integrate manually, or [let an AI implement it](#let-an-ai-implement-it) by copying this page or using APIXO MCP. ## Compare Claude models and pricing Choose the model that fits the workload, then use its exact model ID in any example on this page. | Model | Model ID | Recommended for | Input | Output | Cache write | Cache read | Savings | | - | - | - | -: | -: | -: | -: | -: | | Claude Opus 4.8 | `claude-opus-4-8` | Latest Opus model for the most demanding reasoning, coding, and agentic work | \$3 | \$15 | \$3.75 | \$0.3 | 40% | | Claude Opus 4.7 | `claude-opus-4-7` | High-capability Opus workloads that already target the 4.7 model | \$3 | \$15 | \$3.75 | \$0.3 | 40% | | Claude Opus 4.6 | `claude-opus-4-6` | Existing complex reasoning and coding integrations on Opus 4.6 | \$3 | \$15 | \$3.75 | \$0.3 | 40% | | Claude Opus 4.5 20251101 | `claude-opus-4-5-20251101` | Version-pinned Opus 4.5 integrations | \$3 | \$15 | \$3.75 | \$0.3 | 40% | | Claude Sonnet 4.6 | `claude-sonnet-4-6` | Balanced capability and cost for everyday professional and coding work | \$1.8 | \$9 | \$2.25 | \$0.18 | 40% | | Claude Sonnet 4.5 | `claude-sonnet-4-5` | Existing Sonnet 4.5 integrations that do not need a dated model ID | \$1.8 | \$9 | \$2.25 | \$0.18 | 40% | | Claude Sonnet 4.5 20250929 | `claude-sonnet-4-5-20250929` | Version-pinned Sonnet 4.5 integrations | \$1.8 | \$9 | \$2.25 | \$0.18 | 40% | | Claude Haiku 4.5 20251001 | `claude-haiku-4-5-20251001` | Cost-sensitive, low-latency, and higher-volume Claude workloads | \$0.6 | \$3 | \$0.75 | \$0.06 | 40% | Prices are in USD per 1 million tokens. Prices verified: 2026-08-03. See the [APIXO Claude model page](https://apixo.ai/models/llm/claude) for the current rate card. Start with Claude Opus 4.8 when capability matters most, Claude Sonnet 4.6 for a balanced default, or Claude Haiku 4.5 for lower-cost, higher-volume work. Keep an older or dated ID when your application intentionally pins that model. ## What to change | Setting | APIXO value | | - | - | | SDK Base URL | `https://llm.apixo.ai` | | Raw HTTP path | `POST /v1/messages` | | Request URL | `https://llm.apixo.ai/v1/messages` | | API key | `APIXO_API_KEY` from [APIXO API Keys](https://apixo.ai/dashboard/api-keys) | | API key header | `x-api-key` | | API key value | `$APIXO_API_KEY` | | Required version header | `anthropic-version: 2023-06-01` | | Model location | Request body `model` | `2023-06-01` is the current Anthropic Messages API protocol version, not a Claude model release date. Keep this required header in raw HTTP requests. The Anthropic SDK adds it automatically. ## Quickstart ```bash theme={null} export APIXO_API_KEY="your_apixo_api_key" ``` ```bash theme={null} curl -X POST "https://llm.apixo.ai/v1/messages" \ -H "x-api-key: $APIXO_API_KEY" \ -H "anthropic-version: 2023-06-01" \ -H "Content-Type: application/json" \ -d '{ "model": "claude-opus-4-8", "max_tokens": 256, "messages": [ {"role": "user", "content": "Say hello in one sentence."} ] }' ``` ```javascript theme={null} import Anthropic from "@anthropic-ai/sdk"; const client = new Anthropic({ apiKey: process.env.APIXO_API_KEY, baseURL: "https://llm.apixo.ai" }); const message = await client.messages.create({ model: "claude-opus-4-8", max_tokens: 256, messages: [{ role: "user", content: "Say hello in one sentence." }] }); console.log(message.content); ``` ```python theme={null} import os from anthropic import Anthropic client = Anthropic( api_key=os.environ["APIXO_API_KEY"], base_url="https://llm.apixo.ai", ) message = client.messages.create( model="claude-opus-4-8", max_tokens=256, messages=[{"role": "user", "content": "Say hello in one sentence."}], ) print(message.content) ``` The examples use `claude-opus-4-8`. To use any other model in the comparison table, change only the `model` value. ## Let an AI implement it ### Copy this page to an AI Use the **Copy page** button in the page menu, paste the copied documentation into your AI coding tool, and add this prompt: ```text theme={null} Integrate the APIXO Anthropic-compatible Messages API into my existing project using the documentation below. Requirements: - Use model claude-opus-4-8 unless my project already specifies another supported model. - Read APIXO_API_KEY from an environment variable and keep it server-side. - Preserve my current language, framework, and project structure. - Add the smallest working integration and one minimal verification request. - Do not invent endpoints, model IDs, or request fields that are not documented. ``` Replace `claude-opus-4-8` in the prompt with any model ID from the comparison table. ### Use APIXO MCP [APIXO MCP](/docs/integrations/mcp) reads APIXO's published machine-readable model catalog and schemas. The `claude` schema includes the gateway endpoint, required headers, supported model IDs, model guidance, and the pricing snapshot shown above. After [installing APIXO MCP](/docs/integrations/mcp/installation), ask your AI: ```text theme={null} Use the APIXO MCP tools to find the claude model schema. Compare the supported Claude models and prices, choose the best model for my stated workload, then integrate the APIXO Anthropic-compatible Messages API into this project. Keep the API key server-side and add a minimal verification request. ``` APIXO MCP helps your AI write the integration; it does not replace the API connection used by your application. ## Streaming ```bash theme={null} curl -N -X POST "https://llm.apixo.ai/v1/messages" \ -H "x-api-key: $APIXO_API_KEY" \ -H "anthropic-version: 2023-06-01" \ -H "Content-Type: application/json" \ -d '{ "model": "claude-opus-4-8", "stream": true, "max_tokens": 256, "messages": [ {"role": "user", "content": "Write a short release note."} ] }' ``` ## Supported Claude models Use one of these exact IDs in the request body `model` field. * `claude-opus-4-8` * `claude-opus-4-7` * `claude-opus-4-6` * `claude-opus-4-5-20251101` * `claude-sonnet-4-6` * `claude-sonnet-4-5` * `claude-sonnet-4-5-20250929` * `claude-haiku-4-5-20251001` To switch models, keep the same endpoint, API key, headers, and request format, then change only `model`. ## Troubleshooting * `401`: missing or invalid API key * `400`: invalid Messages API request body, unsupported model ID, missing `max_tokens`, or missing `anthropic-version` * `429`: rate limit or temporary capacity limit * `502` / `504`: upstream provider error or timeout Retry `429`, `502`, and `504` with backoff. Fix `400` and `401` before retrying. ## Related links * [Chat API Overview](/docs/llm) * [Supported Models](/docs/llm/supported-models) * [LLM Authentication](/docs/llm/authentication) * [LLM Streaming](/docs/llm/streaming) * [LLM Errors and Retry](/docs/llm/errors-retry) * [Install APIXO MCP](/docs/integrations/mcp/installation) * [Anthropic API versioning](https://platform.claude.com/docs/en/api/versioning) * [Explore Claude models on APIXO](https://apixo.ai/models/llm/claude) * [Pricing](https://apixo.ai/pricing) ## Open a model on APIXO These links open the selected model on APIXO's Claude gateway page, where you can review its current pricing and copy model-specific code examples. * [Claude Opus 4.8](https://apixo.ai/models/llm/claude?model=claude-opus-4-8) * [Claude Opus 4.7](https://apixo.ai/models/llm/claude?model=claude-opus-4-7) * [Claude Opus 4.6](https://apixo.ai/models/llm/claude?model=claude-opus-4-6) * [Claude Opus 4.5 20251101](https://apixo.ai/models/llm/claude?model=claude-opus-4-5-20251101) * [Claude Sonnet 4.6](https://apixo.ai/models/llm/claude?model=claude-sonnet-4-6) * [Claude Sonnet 4.5](https://apixo.ai/models/llm/claude?model=claude-sonnet-4-5) * [Claude Sonnet 4.5 20250929](https://apixo.ai/models/llm/claude?model=claude-sonnet-4-5-20250929) * [Claude Haiku 4.5 20251001](https://apixo.ai/models/llm/claude?model=claude-haiku-4-5-20251001) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.