Claude API Free Trial — Get $5 Free Credit

There is no indefinitely-free Claude API. Anthropic does not offer a permanent free tier for API access, and any gateway claiming 'free unlimited Claude' is either lying or about to disappear. However, Claude API Key Unlimited offers a genuine $5 free credit for new accounts via the WELCOME5 promo code — enough to test your setup, run real Claude Code sessions, and evaluate whether the gateway fits your workflow before spending money.

The Honest Answer About Free Claude API Access

If you are searching for 'claude api free' or 'unlimited claude for free,' here is the reality: no legitimate provider offers indefinitely free Claude API access. Claude models require significant compute to run, and that compute costs money. Anthropic does not have a free API tier (unlike some providers that offer limited free credits on sign-up). Any service promising free unlimited Claude access is either a scam, a honeypot for credential theft, or a temporary promo that will expire.

What does exist: promotional credits that give you genuine free usage for a limited amount. This is real API credit that works exactly like paid credit — per-token billing against your balance until it is exhausted. It is not a trick, not a trial that auto-converts to a subscription, and has no hidden charges.

The $5 is designed to let you verify the setup works, test your integration, and get a feel for how fast credit depletes with your specific workflow. After that, you can make an informed decision: add more pay-as-you-go credit, purchase an unlimited plan, or decide the gateway is not for you and walk away with no charges.

How to Claim the $5 Free Credit

Register at unlimited.claudeapikey.dev with your email and password. Confirm your email address by clicking the verification link. Log into the dashboard. Click Apply. The $5 credit appears in your balance immediately.

Next, generate an API key from the dashboard. Configure your tools with the key and base URL (ANTHROPIC_BASE_URL=https://claudeapikey.dev for Claude Code, or /v1 suffix for OpenAI-compatible tools). Start using Claude. The credit deducts in real time as you make requests — you can watch it decrease in the dashboard to understand your consumption rate.

The promo code is one-time per account. Creating multiple accounts to claim it repeatedly violates terms of service and will result in all accounts being banned. One account, one $5 credit, one honest evaluation period.

What You Can Do With $5 of Claude API Credit

On Claude Sonnet 4.5/4.6 ($1.50 input / $7.50 output per million tokens): approximately 1 million input tokens or 670K output tokens. In practical terms, that is 2-4 hours of active Claude Code development, roughly 50-80 substantial API requests, enough to complete a medium-sized feature implementation, or run comprehensive tests across several code files.

On Claude Opus 4.8 ($5 input / $25 output per million tokens): approximately 200K input tokens or 200K output tokens. This covers about 30-60 minutes of active Claude Code work with Opus, or 10-20 complex requests with large context. Opus burns through credit faster, but the quality is noticeably higher for complex reasoning tasks.

On Claude Haiku 4.5 ($0.25 input / $1.25 output per million tokens): approximately 4 million input tokens. This is substantial — enough for lightweight automation testing, quick Q&A sessions over several days, or hundreds of simple classification and extraction requests. Haiku is the best model for stretching free credit as far as possible while still getting genuinely useful Claude intelligence for structured tasks.

After the Free Credit — Upgrade Paths

When your $5 credit runs out, you have three options. First, add more pay-as-you-go credit: top up any amount from $5 and continue with per-token billing. This makes sense if your usage is light or occasional. Second, purchase an unlimited plan: $9 for 1 day or $39 for 1 week of flat-rate access to all models with no per-token billing. This makes sense if you used your $5 credit in under a day.

Third, do nothing. Your account remains active with zero balance — no charges, no subscription, no auto-renewal. If you try to make API requests with zero balance and no active plan, they return an error. Your key stays valid and will work again the moment you add credit or purchase a plan. There is no penalty for inactivity.

The speed at which you consumed the $5 credit tells you which path to choose. If it lasted a week, pay-as-you-go at $5-10/month probably works. If it lasted one day, the unlimited plans will save money. If it lasted an hour (heavy Opus usage), the unlimited plan is clearly the right choice for your usage pattern.

Why There Is No Free Unlimited Claude

Claude models run on expensive GPU clusters. Each API request requires real compute time proportional to the number of tokens processed. Opus, the strongest model, requires the most compute per request. No business model supports giving this away indefinitely for free — the marginal cost per request is non-zero and significant at scale.

Services that claim to offer free unlimited Claude API access are typically: credential phishing sites that steal your input data, proxy services running on stolen API keys that will stop working when the keys are revoked, or bait-and-switch operations that work briefly to build trust before charging hidden fees or selling your data.

The honest approach is transparent pricing. Claude API Key Unlimited provides a genuine $5 free trial to prove the service works, then clear paid options for continued use. The unlimited plans are genuinely flat-rate during the plan period with no hidden per-token charges. This is sustainable because the pricing accounts for average usage patterns across all users under fair-use rate limits.

# Step 1: Register at https://claudeapikey.dev
# Step 3: Generate API key from dashboard
# Step 4: Configure your environment:

export ANTHROPIC_BASE_URL="https://claudeapikey.dev"
export ANTHROPIC_API_KEY="your-free-trial-key"

# Step 5: Use Claude Code (or any compatible tool):
claude

# Your $5 credit covers approximately:
# - 1M Sonnet tokens (2-4 hours of Claude Code)
# - 200K Opus tokens (30-60 min of Claude Code)
# - 4M Haiku tokens (days of light usage)

# Check remaining balance anytime on the dashboard

Frequently asked questions

Is there a free Claude API key?
There is no permanently free Claude API key from any legitimate provider.

How do I get unlimited Claude for free?
You cannot get unlimited Claude for free. Services claiming this are scams. After that, the unlimited plan ($9/day or $39/week) offers flat-rate access without per-token billing.

Does the free credit auto-renew or charge my card?
No. The $5 promo credit is a one-time addition to your balance with no strings attached. There is no auto-renewal, no card required to claim it, and no charges when it runs out. Your account simply has zero balance until you manually add more.

How long does $5 of Claude API credit last?
It depends on your model choice and usage intensity. Roughly 2-4 hours of active Claude Code on Sonnet, 30-60 minutes on Opus, or several days of light Haiku usage. The dashboard shows your remaining balance in real time so you can track consumption.

Claude API Key is an independent API gateway. It is not affiliated with, endorsed by, or a reseller of Anthropic. Claude and related model names are trademarks of their respective owners.