Sonnet 5 on every message ProiOS 27

• Sonnet 5 for quick questions tooThrough Block, Claude Haiku 4.5 answers most messages. Claude Sonnet 5 answers when you build a block or a program, when the app asks for your next targets, and when the trainer writes your rules file. With your key, Claude Sonnet 5 answers every message. Each answer can be up to 8,192 tokens long. A Haiku answer stops at 1,500 tokens.
• No monthly limit from BlockThrough Block, Block Pro includes up to 60 Claude messages a month, within a monthly cost limit. Heavy use of Sonnet 5 can end the month's messages sooner. With your key, Block sets no limit. Your credit and your Console limits still apply.
• A 16-week block in one chatGive your goal, days a week, session length and gym. The trainer starts from one of the 21 programs, fits it to you and proposes the whole block on your training days, with its deload. Tap Review program before Apply program. Then ask for a lighter week 6 or a different squat. Sonnet 5 writes every reply.
• Next targets after every sessionWhen you save a session, the app asks the trainer for the workout's next targets. It reads every set and proposes each lift's next load and reps on one card, each with its reason and its research. With your key, Anthropic bills it to your Console account.
• Talk a session through between setsOpen the trainer from the session's top row. It sees every set you logged. Ask for a lighter last set, a swap, an added lift or a lift taken out. It never changes a set you logged. A change can be for today, for the workout, or both.
• Straight to AnthropicEach request goes from your iPhone to Anthropic. Block's server never sees the key or the chat. The key stays in this iPhone's Keychain, for your account only.

• Build me a 16-week block for my first powerlifting competition. Four days a week, 75 minutes, full gym. My squat is my weakest lift.

  It reads About you and your history, starts from one of the 21 programs and fits it to you. You get the whole block on one card. Tap Review program to check each workout. Then tap Apply program.

• Review my last block. Which lifts stalled, and what should change in the next one?

  It reads every session of the block and your weekly sets per muscle. It answers with your numbers and cites a research card for each change it suggests.

• Set my next targets for Lower B from the session I just saved (Thu 1 Oct).

  The app sends this for you after each saved session. The answer is one card with each lift's next load and reps, its call and the reason. The card saves only when you tap Apply. Without it, your next Start session saves the app's own calls.

• I missed my third set of squats at 315. What should I do for the last two?

  In a session, the trainer sees every set you logged. It can lower today's load for the sets you have not logged. The lamps judge today's numbers, and the workout keeps its own.

• How close to failure should I train for size? Give me the sources.

  It reads Block's research cards and cites each point in brackets, for example (Refalo 2023). Under the answer, the app lists each paper with a link to it.

• Look up the rules for my federation's next competition: allowed equipment and the squat depth rule.

  With web search on, it searches the web and names the sites in its answer. The app lists the pages it cites. Each search costs $0.01 on your Console bill.

• Compare my squat and my bench over the last 12 weeks. Which one moves faster, and why?

  It reads each lift's history and your weekly totals. It answers with the numbers and dates from your log.

• Make this block a rolling cycle: 3 days on, 1 off, 8 cycles, deload in cycle 6.

  It proposes the change to the saved block on one card. The card says where your sessions so far leave the block. Tap Apply to save it.

1. Make a Claude Console account

   Open platform.claude.com. The old address, console.anthropic.com, goes to the same place.

   Sign in, or create an account. Answer the Console's questions about your organization and your use of the API.

2. Add credit

   In the Console, open Settings > Billing. Click Buy credits. Enter an amount. Confirm the purchase. The credit is ready at once.

   Credits expire one year after you buy them, and Anthropic does not refund them. Start with a small amount. Auto-reload, on the same page, buys more when the balance falls below a number you set.

3. Set a spend limit

   This step is optional. We recommend it.

   In the Console, on Settings > Billing, find Spend limits. Click Set limit, or Adjust limit if you have one. Enter the most you want to spend in a month.

   At the limit, Anthropic refuses your key's requests until access resumes, or until you raise the limit. The built-in trainer answers in the meantime.

4. Create an API key

   In the Console, open Settings > API keys. In the Block app, Open Claude Console opens this page. Click Create key.

   • Name: Block.
   • Expiration: Never if your organization allows it, or a date you will remember. An expired key stops working.
   • Linked account: yourself.
   • Workspace: create the key in one workspace, for example the Default Workspace. The Block app does not send a workspace ID, so a key for several workspaces fails the check.

   Copy the key. It starts with sk-ant-. The Console shows it only once. If you lose it, create a new key.

5. Save the key in the Block app

   1. Open Today. Tap the gear to open Settings.
   2. Under AI, tap Your Claude key.
   3. Paste the key in the field.
   4. Tap Verify & save key.

   The Block app sends a one-token request to Anthropic with Claude Sonnet 5. The check fails for a wrong key, a key without a workspace, no credit, or no access to the model. Then the reason shows under the field, and the app does not save the key.

   When the check passes, the key goes into this iPhone's Keychain. Under Your key, the screen shows Key with the start and end of the key (for example sk-ant-api03-…x7Qa), then Remove key. Below it: Anthropic bills your Console account. Block sets no monthly limit. Set a spend limit in the Console. Settings shows the same hint beside Your Claude key.

   Saving the key is your permission to send your questions and training data to Anthropic with it.

   The field refuses text that is not an API key:

   • A Claude subscription token: That is a Claude subscription token. Block needs an API key from the Claude Console.
   • An Admin key: That is an Admin key. Make an API key in the Claude Console.
   • Any other text: An Anthropic API key starts with sk-ant-.

   

6. Ask the trainer

   Tap Ask trainer on Today or Plan, and ask a question.

   The line under the message field shows Claude Sonnet 5 and your key. Tap the line to open About the trainer, which names the same AI model.

   In a session, the line names the session instead. Below iOS 27, it reads Needs iOS 27, and the trainer does not answer.

• We worked these out from the prices above. Your real bill depends on how long your chat and the answers are.
• Each request carries about 11,000 tokens of the trainer's instructions and tools, about 4,000 tokens of your training data, and the chat so far.
• Each tool result is about 2,000 tokens. Each tool step writes about 400 to 600 output tokens, thinking included.
• The last answer is about 600 tokens for a question, 1,500 for next targets and 7,000 for a block.
• No web searches. Each search adds $0.01 and the pages it reads.
• The ranges show the cost with and without Anthropic's prompt cache.

The privacy policy has the details.

• The AI trainerEverything the trainer does: programs, next targets, changes while you lift, and the research behind each call.
• Connect an assistantHave a Claude plan and no API key? Connect Claude to Block. You chat in Claude's own app, on your Claude plan, and Claude reads and saves your training in Block. It needs Block Pro.