Cheap Claude API access, billed per token
RelaySwitch sells API access to 13 Claude models, billed per token from a prepaid balance. The key runs in Claude Code and in any client that takes a base URL and a key. RelaySwitch is not Anthropic, is not affiliated with Anthropic and does not sell Claude Pro or Max.
- Minimum top-up
- $10
- Pay with
- USDT, USDC, BTC, ETH, SOL, or card
- Sign-up
- An email address, or sign in with Google or GitHub. No phone number, no identity documents.
- Models
- 323 on one key, prices read live
- Base URL
https://api.relayswitch.io/v1OpenAI Chat Completions and Responses on 314 models, Anthropic Messages on 314, Gemini generateContent on 314- One message, example
- $0.00031 on Manta Flash 1.0; $0.0033 on Claude Sonnet 5.5 for one 2K-in / 300-out turn
- Subscription
- None. Prepaid credit, billed per token.
- Model check
- daily real-model check
Claude Pro and the Claude API are two products
The plan facts are from Anthropic's pricing page at claude.com/pricing, read 2026-11-11. Check that page before you buy; plans change.
Claude Pro, Max and Ultra, from Anthropic
- Subscriptions sold by Anthropic: Pro $20, Max $100, Ultra $200 a month on 2026-11-11.
- Each is a plan for the Claude apps, with Claude Code included.
- Usage has limits: every 5 hours and every week on Pro and Max, every week on Ultra. The pricing page states none of them in tokens.
- RelaySwitch does not sell, discount, share or resell these plans.
Claude by API, on this key
- The Claude models answer Anthropic's Messages format at
https://api.relayswitch.io/v1/messagesand the OpenAI format athttps://api.relayswitch.io/v1/chat/completions. - Each request bills per token at the rates below, from a prepaid balance in USD. The first top-up is $10, by card or in USDT, USDC, BTC, ETH, SOL.
- Claude Code runs on the key with two environment variables. Any client with a base URL field and a key field takes it too.
- The key does not sign in to claude.ai or the Claude apps. The playground chats with any model on the key in a browser.
Every Claude model on the key
USD per million tokens, read from the catalog at render. Anthropic's list price beside ours where the catalog has it.
| Model | Input | Cached | Output | Developer list in / out | Context |
|---|---|---|---|---|---|
| Claude Fable 5.1 | $6.00 (40% under) | $2.00 | $30.00 (40% under) | $10.00 / $50.00 | 1M tokens |
| Claude Fable 5.2 | $4.00 (50% under) | $0.10 | $20.00 (50% under) | $8.00 / $40.00 | 1M tokens |
| Claude Fable 5 | $3.00 (70% under) | $0.30 | $15.00 (70% under) | $10.00 / $50.00 | 1M tokens |
| Claude Opus 5.5 | $2.716 (32% under) | $0.1455 | $9.70 (51% under) | $4.00 / $20.00 | 1M tokens |
| Claude Sonnet 4.6 | $1.80 (40% under) | $0.18 | $9.00 (40% under) | $3.00 / $15.00 | 1M tokens |
| Claude Opus 4.6 | $1.80 (64% under) | $0.16 | $7.50 (70% under) | $5.00 / $25.00 | 1M tokens |
| Claude Opus 4.7 | $1.80 (64% under) | $0.16 | $7.50 (70% under) | $5.00 / $25.00 | 1M tokens |
| Claude Opus 4.8 | $1.80 (64% under) | $0.16 | $7.50 (70% under) | $5.00 / $25.00 | 1M tokens |
| Claude Opus 5 | $1.80 (64% under) | $0.16 | $7.50 (70% under) | $5.00 / $25.00 | 1M tokens |
| Claude Haiku 4.5 | $0.60 (40% under) | $0.06 | $3.00 (40% under) | $1.00 / $5.00 | 200K tokens |
| Claude Sonnet 5 | $1.20 (40% under) | $0.12 | $3.00 (70% under) | $2.00 / $10.00 | 1M tokens |
| Claude Sonnet 5.5 | $1.20 (40% under) | $0.075 | $3.00 (70% under) | $2.00 / $10.00 | 1M tokens |
| Claude Haiku 5.5 | $0.0582 (41% under) | $0.01 | $0.1455 (70% under) | $0.10 / $0.50 | 1M tokens |
13 Claude ids, dearest output first. The percent in brackets is how far a rate sits under Anthropic's list price. Cached input is priced lower where the row supports it.
Per-token billing at three usage levels
One agent turn late in a coding session: 80,000 cached tokens, 2,000 new input tokens and 1,500 output tokens. A month is 20 working days. The turn size is an assumption; the rates are today's.
| Model | One turn | Light, 30 turns a day / month | Steady, 150 turns a day / month | Heavy, 400 turns a day / month |
|---|---|---|---|---|
| Claude Opus 5.5 | $0.0316 | $18.97 | $94.87 | $252.98 |
| Claude Sonnet 5.5 | $0.0129 | $7.74 | $38.70 | $103.20 |
| Claude Haiku 5.5 | $0.0011 | $0.6808 | $3.40 | $9.08 |
Computed at render from the live rates, cached input at the cached rate. Your own sessions differ with repo size and turn count; the signed receipt on each request has the real charge.
| Anthropic plan, 2026-11-11 | Turns on Claude Opus 5.5 | Turns on Claude Sonnet 5.5 | Turns on Claude Haiku 5.5 |
|---|---|---|---|
| Pro, $20 a month | 632 | 1,550 | 17,626 |
| Max, $100 a month | 3,162 | 7,751 | 88,132 |
| Ultra, $200 a month | 6,324 | 15,503 | 176,265 |
The plan's monthly price divided by the cost of one turn above, rounded down. This converts the price into per-token turns here; the plan's own allowance is not stated in tokens.
To read the two tables, count your turns on a working day, find the nearest column and set that month beside the plan price. A day with no requests draws nothing from the balance.
Claude Code and the Anthropic SDK
Two values change: the base URL becomes https://api.relayswitch.io/v1 and the key becomes yours.
Claude Code
export ANTHROPIC_BASE_URL="https://api.relayswitch.io/v1"export ANTHROPIC_AUTH_TOKEN="sk-relay-..."claudeThe Claude Code guide has the settings.json form, the model aliases and a key with a budget for Claude Code alone.
Python, with the Anthropic SDK
import anthropic client = anthropic.Anthropic(base_url="https://api.relayswitch.io/v1", api_key="sk-relay-...")reply = client.messages.create( model="claude-sonnet-5-5", max_tokens=300, messages=[{"role": "user", "content": "Hello"}],)print(reply.content[0].text)Cursor, the OpenAI SDK and other OpenAI-format clients call the same ids through the OpenAI-compatible API.
Cheap Claude API: questions
Claude Pro, Claude Code, Max and the bill.
Claude by the token, from a $10 top-up
By card or in USDT, USDC, BTC, ETH, SOL. Set two environment variables and Claude Code runs on the key.