EasyAPI

claude-opus-5

TEXT

Flagship model for demanding reasoning, coding, and long-horizon agentic work, spanning end-to-end software, code review, parallel subagent coordination, visual analysis of charts and documents, and complex office deliverables.

Input price

$4.2515% off

Market: $5

/ M

Output price

$21.2515% off

Market: $25

/ M

Cache read

$0.42515% off

Market: $0.5

/ M

Cache write

$5.312515% off

Market: $6.25

/ M

Input

Text

Output

Text

API

Quick Start

Drop-in code to call this model with EasyAPI's OpenAI-compatible API.

1

Get your API key

Create an API key from your dashboard and set it as an environment variable:

Replace sk-xxxxxxxx with your API token from the console (Bearer token).

Create API token
shell
export EASYAPI_API_KEY=sk-xxxxxxxx
2

Make your first request

Use anthropic/claude-opus-5 with the EasyAPI API:

cURL
curl https://token.easyapi.com/v1/messages \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $EASYAPI_API_KEY" \
  -d '{
  "model": "anthropic/claude-opus-5",
  "messages": [
    {
      "role": "user",
      "content": "Hello!"
    }
  ]
}'
3

Enable streaming

Add "stream": true to your request body to receive responses as server-sent events:

curl
curl -N https://token.easyapi.com/v1/messages \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $EASYAPI_API_KEY" \
  -d '{"model":"anthropic/claude-opus-5","messages":[{"role":"user","content":"Hello!"}],"stream":true}'

Endpoint

Sends a chat completion request. Supports streaming and non-streaming modes.

POSThttps://token.easyapi.com/v1/messages
Authorization
Bearer $EASYAPI_API_KEY
Content-Type
application/json
Model
anthropic/claude-opus-5

Send a chat completion request, with streaming or non-streaming responses. Docs

POSThttps://token.easyapi.com/v1/messages
Authorization
Bearer $EASYAPI_API_KEY
Content-Type
application/json
Model
anthropic/claude-opus-5

Anthropic Messages API–compatible format with text, image and tool-use support. Docs

GEThttps://token.easyapi.com/v1/models
Authorization
Bearer $EASYAPI_API_KEY

List the models available to the current account. Docs

Parameters

NameTypeDefaultDescription
modelstring—Model ID, e.g. openai/gpt-4o or anthropic/claude-3-5-sonnet
messagesarray—List of conversation messages, each with role and content
streambooleanfalseWhen true, the response is streamed via SSE
temperaturefloat1Sampling temperature; higher values are more random
max_tokensinteger—Maximum number of tokens generated in a single reply
top_pfloat1Nucleus sampling; limits the cumulative probability of candidate tokens
frequency_penaltyfloat0Frequency penalty; reduces repeated wording
presence_penaltyfloat0Presence penalty; encourages new topics

Using third-party SDKs

Official OpenAI and other SDKs work by swapping the base URL. See integration guide

Related models

claude-fable-5

Anthropic

Claude Fable 5 is Anthropic’s advanced long-horizon reasoning model, supporting text, image, and file inputs with text output. It features reasoning capabilities and a 1M-token context window, making it suitable for autonomous knowledge work, software development, and complex multi-step tasks.

TextMultimodal
15% off
Input price

$8.5/ M

Output price

$42.5/ M

Cache read

$0.85/ M

Cache write

$10.625/ M

claude-fable-5.1

Anthropic

Fable 5.1 further improves agentic coding, long-running workflows and knowledge work, making it well suited to large-scale refactoring and front-end development.

AnthropicChat
Input price

$10/ M

Output price

$50/ M

Cache read

$0.25/ M

Cache write

$12.5/ M

claude-haiku-4.5

Anthropic

Fast and affordable. Handles simple tasks well.

TextMultimodal
15% off
Input price

$0.85/ M

Output price

$4.25/ M

Cache read

$0.085/ M

Cache write

$1.0625/ M

claude-opus-4.5

Anthropic

Strong in deep reasoning and long-context tasks.

TextMultimodal
15% off
Input price

$4.25/ M

Output price

$21.25/ M

Cache read

$0.425/ M

Cache write

$5.3125/ M