Step-by-step guides for ChatGPT, Claude, Gemini, Perplexity, and more — how to use them, fix errors, and get the most out of every feature.
Perplexity Pro search limits changed in late 2025 from a daily cap to a weekly cap. As of 2026, Pro subscribers get approximately 200 Pro searches per week (not per day), with file uploads capped at 50 per week. Quick searches remain unlimited. Limits reset weekly, not at midnight UTC daily. If you hit the cap, switch to Quick search or wait for the weekly reset.
Claude Pro costs $20/month and payment declines are almost always caused by your bank blocking the charge, not a problem with Claude itself. Call your bank or approve the transaction in your banking app, then retry in a clean incognito window. If a 3D Secure prompt appeared and timed out, that is the most common single cause — complete the bank verification step and retry.
Claude Pro enforces a 5-hour rolling usage window — not a daily reset. When you exhaust that window, you must wait until the oldest messages age out before the quota refreshes. Free users face stricter caps with no fixed window. As of May 6, 2026, Anthropic removed peak-hour throttling for Pro and Max subscribers, so you no longer get slower responses during busy periods (5am–11am PT). To continue working sooner: upgrade to Max ($100–$200/month for 5x–20x more headroom), batch your messages, or switch to shorter conversations.
Start with a clean session (sign out, clear cache/cookies, disable extensions), then verify plan/permissions, check status/incidents, and retry on another network. If it persists, capture logs/error details and contact support.
Claude is available in most countries but is restricted in a handful of regions due to legal and compliance requirements. If you see a 'not available in your region' message, this is a genuine geographic restriction that cannot be bypassed through normal troubleshooting. However, if you are receiving the error despite being in a supported country, the issue is likely your IP address appearing to be in a restricted region — disabling your VPN or switching to a different network usually resolves this.
ChatGPT Plus costs $20/month and payment declines are most commonly caused by bank blocks on international or recurring online charges — call your bank to authorize the transaction, then retry once in an incognito window without VPN. If you were charged but Plus did not activate, sign out and back in and wait 15–30 minutes before contacting support.
Start with the issue clusters most likely to solve common ChatGPT problems quickly.
Payment failed, subscription not activating, refunds, renewal issues, and premium features still locked.
Login loops, sign-in errors, invalid sessions, 2FA issues, and account access problems.
Message stream errors, conversation loading failures, blank pages, crashes, and missing history.
Rate limits, too many requests, usage caps, upload limits, and regional restrictions.
Chat assistant and AI platform.
197 issuesAI assistant for writing and analysis.
185 issuesAI image generation tool.
150 issuesAI answer engine.
159 issuesAutomation and agent tooling.
98 issuesGoogle's AI assistant and model platform.
1 issueAI-powered code editor.
4 issuesAI coding assistant for developers.
1 issueFirst steps, account setup, and beginner guides.
2 issuesStep-by-step tutorials for features and common tasks.
5 issuesAdvanced techniques, productivity tips, and power-user guides.
1 issueTroubleshoot error messages and unexpected behavior.
203 issuesResolve usage limits, rate limits, account restrictions.
197 issuesFix payment failures, subscription issues, billing errors, refunds.
203 issuesFix login, verification, and access issues.
184 issuesMany users report GPT-5 (and GPT-5.5) feeling less capable than GPT-4o for creative writing, coding, and following complex instructions. This is not a bug — GPT-5 was optimized for reasoning and safety over raw creative output. Workarounds: use o3-mini for coding tasks, add explicit formatting instructions, or use the system prompt to request GPT-4o-style behavior. GPT-4o is no longer available in the ChatGPT interface but remains accessible via the API.
ChatGPT memory stops working when the feature is toggled off in Settings, when you exceed the 256KB memory storage limit, or after major model updates that reset memory indexing. Fix: go to Settings → Personalization → Memory and confirm it is enabled. If enabled but not working, clear old memories to free space, then explicitly tell ChatGPT to 'remember this' in your next conversation.
ChatGPT Plus ($20/month) gives approximately 160 GPT-5.5 messages per 3-hour rolling window. ChatGPT Pro ($200/month) gives significantly higher limits — roughly 10x Plus — plus unlimited access to o1 pro mode and priority access to new models. For most users, Plus is sufficient. Pro is designed for professionals who hit the Plus cap multiple times daily.
Claude Code versions before v2.1.34 contained two independent bugs that broke prompt caching, causing every interaction to be billed at full token cost instead of the cached rate. This inflated usage by 10 to 20 times, draining daily Pro budgets in under 20 minutes. The fix is to update Claude Code to v2.1.34 or later with 'npm update -g @anthropic-ai/claude-code'. Anthropic confirmed the bug in March 2026.
Claude Code drains your usage limit fast because each tool call (read file, write file, run command) counts as a separate token-consuming interaction, and a known prompt caching bug in versions before v2.1.34 inflated costs by 10–20x. Fix: update Claude Code to the latest version, switch the default model from Opus 4 to Sonnet 4, and break large agent sessions into smaller tasks.
Claude Pro ($20/month) gives a rolling usage budget that resets every 8 hours; Claude Max 5x ($100/month) gives 5 times that budget, and Claude Max 20x ($200/month) gives 20 times. Pro users typically get 45–90 messages per 8-hour window depending on message length. Max 5x users report the budget draining in under an hour during heavy Claude Code or long-context sessions.