Testing Grok 4.5 without free credits requires committing money to a model before validating it on a specific workload. A single 500K-context request can consume $1.50+ in tokens at official rates, which adds friction for developers evaluating multiple providers in parallel.
Every platform in this list offers some form of free credit for Grok 4.5, but the amount, expiry period, and post-trial pricing vary substantially. Some provide $5 with a 30-day expiry; others offer smaller amounts without expiry but pair them with higher post-trial rates. Pricing and free-credit mechanics across Grok API providers differ substantially, and post-trial cost trajectory often outweighs the headline credit amount. The rankings below weigh both the free tier and the ongoing cost after it is depleted.
How We Evaluated Free Access
Four factors:
- Free credit amount at signup
- Signup friction (email-only vs KYC)
- Credit expiry rules
- Ongoing cost after free tier is depleted
A large one-time credit means little if the post-free rate is 3× the market. Small credits with permanent discounts often outperform.
At-a-Glance Table
| Platform | Free Credit | Signup | Expiry | Post-Free Input $/M | Post-Free Output $/M |
| ApiPass | Free credits for new users | Email (no xAI account needed) | None | $1.00 / $2.00 (tiered) | $3.00 / $6.00 (tiered) |
| Kie.ai | ~$5 equivalent | 30 days | $1.20 | $6.00 | |
| AIML API | ~$5 | Email + verification | 30 days | $2.55 | $12.75 |
| Evolink.AI | ~$3 | 14 days | $1.20 | $6.00 | |
| GPTProto | Rebate on first top-up | With balance | $1.80 | $9.00 | |
| WaveSpeed | Trial credits | 30 days | $2.10 | $10.50 | |
| Apertis | Trial credits | 30 days | $2.40 | $12.00 | |
| Atlas Cloud | Trial credits | Email + verification | 30 days | $2.40 | $12.00 |
| OpenRouter | Small starter balance | None | ~$3.00 | ~$15.00 | |
| Flaq.ai | Minimal starter credit | 14 days | $0.30 | $1.50 |
The 10 Platforms Offering Free Grok 4.5 Access
1. ApiPass
Platform Snapshot
ApiPass gives new users free credits at signup with no expiry, which removes the time pressure most other providers attach to free tiers. The bigger draw is what happens after: a permanent flat 50%-off rate on every request compared to xAI official pricing, tiered by context length rather than gated behind a plan. Grok 4.5 access is designed around the existing Grok CLI — developers set the ApiPass Base URL and API key once in ~/.grok/config.toml and every existing Grok CLI command continues to work unchanged, with no need to purchase, rent, or manage an xAI account. An OpenAI-compatible endpoint covers non-CLI paths. Signup is email-only, setup takes under 60 seconds, and every request is itemized in the dashboard by input, output, and cache-read tokens from the trial onward.
Free Access & Onboarding
- Free credits for new users at signup
- Email-only signup
- No expiry on trial credits
- No xAI account required
- No credit card required to start
- 60-second setup via ~/.grok/config.toml
Cost After Free Tier
- Short context (≤200K tokens):
- Input: $1.00 / M tokens
- Output: $3.00 / M tokens
- Cache read: $0.25 / M tokens
- Long context (>200K tokens):
- Input: $2.00 / M tokens
- Output: $6.00 / M tokens
- Cache read: $0.50 / M tokens
- Flat 50% off xAI official rates on every request
- Pure pay-as-you-go — no subscription, no monthly minimum
Upsides
- Free credits do not expire
- Half-off pricing applies to every request, not only during the trial window
- Grok CLI workflows migrate in under 60 seconds without code changes
- Itemized token billing (input / output / cache-read) exposed from the trial onward
- No xAI account to buy or manage
Trade-offs
- Only serves Grok models; not useful for teams that also route to Claude or GPT
- Long-context (>200K) requests are billed at the higher tier
Who Should Pick This
Developers who want minimal free-tier friction, plan to keep using Grok 4.5 long-term, and want their existing Grok CLI workflows preserved — where the permanent 50%-off discount matters more than the initial credit amount.
2. Kie.ai
Platform Snapshot
Kie.ai’s free credits sit at roughly $5 equivalent in its internal credits system, with a 30-day expiry that scopes evaluation to a focused sprint rather than open-ended experimentation. Post-trial pricing is among the lowest in this list at $1.20 input and $6.00 output per million. Cached prompts are discounted on a tiered schedule that gets cheaper with monthly volume. Signup is email-only with no card required, and access is through an OpenAI-compatible endpoint.
Free Access & Onboarding
- ~$5 credits at signup
- Email registration
- 30-day expiry
- No card required
Cost After Free Tier
- Input: $1.20 / M tokens
- Output: $6.00 / M tokens
- Tiered cache discounts increase with volume
Upsides
- Large enough free credit for realistic prototyping
- Aggressive post-trial pricing
- Tiered volume discounts
Trade-offs
- Credits expire in 30 days
- Credits system has occasional rounding surprises on small requests
Who Should Pick This
Developers doing a focused evaluation sprint who can consume the credits within a month.
3. AIML API
Platform Snapshot
AIML API’s free tier includes roughly $5 in credits that work across its 1,000+ model catalog, not just Grok 4.5. This makes it useful for teams comparing Grok against Claude, GPT, or open-source models during the same evaluation window under a single billing account. Signup requires email plus a verification step, and credits expire after 30 days. Post-trial pricing sits at $2.55 input and $12.75 output per million with a 75% cache discount, and the full 500K context on Grok 4.5 is available from the first request.
Free Access & Onboarding
- ~$5 credits at signup
- Email plus verification step
- 30-day expiry
- Full catalog access
Cost After Free Tier
- Input: $2.55 / M tokens
- Output: $12.75 / M tokens
- 75% cache discount
- 500K context
Upsides
- Free credits usable across many models
- Full 500K context on Grok 4.5
- Deep cache discount
Trade-offs
- Verification step adds friction
- Post-trial base rates close to official pricing
Who Should Pick This
Teams evaluating Grok 4.5 alongside other frontier models under a single billing account.
4. Evolink.AI
Platform Snapshot
Evolink.AI hands out around $3 in trial credits with a 14-day window — a shorter runway than most competitors, but paired with a specific post-trial advantage. The main draw is what happens after: an 85% discount resulting in a $1.20 input rate, and configurable budget caps per API key stop runaway agent spend before it becomes a bill. Signup is email-only with no card required. Context is capped at 128K rather than 500K.
Free Access & Onboarding
- ~$3 trial credits
- Email signup
- 14-day expiry
- No card required
Cost After Free Tier
- Input: $1.20 / M tokens
- Output: $6.00 / M tokens
- Cache: 85% off input rate
- Per-key budget caps
Upsides
- Deep cache discount rewards repeated-context workloads
- Budget caps protect against runaway agent spend
- Aggressive base pricing
Trade-offs
- 14-day window is tight
- 128K context
Who Should Pick This
Cache-heavy workloads where a short trial is enough to prove out ROI before committing.
5. GPTProto
Platform Snapshot
GPTProto’s free tier is structured as a top-up rebate rather than a one-time signup credit. Depositing $10 might yield $13–$14 in usable balance, depending on the rebate tier, and the balance itself does not expire while the account remains active. Post-rebate pricing is $1.80 input and $9.00 output per million, with cached input at $0.30 per million. The reasoning_effort parameter is exposed during evaluation, letting developers tune thinking depth as part of the initial testing rather than after commitment.
Free Access & Onboarding
- Rebate on first deposit (no pure signup credit)
- Email registration
- Balance does not expire while account is active
- Rebate tiers scale with top-up amount
Cost After Free Tier
- Input: $1.80 / M tokens
- Output: $9.00 / M tokens
- Cache: $0.30 / M tokens
- reasoning_effort parameter exposed
Upsides
- Balance persistence removes expiry pressure
- Reasoning parameter useful during evaluation itself
- Cache pricing competitive
Trade-offs
- Requires paid top-up to unlock rebate
- No fully free evaluation without spending
Who Should Pick This
Developers ready to commit at least $10 to a serious evaluation and who want reasoning-depth control from the start.
6. WaveSpeed
Platform Snapshot
WaveSpeed’s trial credits are pitched at latency-focused evaluation, with the 92ms TTFT figure testable within the free tier rather than gated behind a paid plan. Free web search is included during the trial, which removes a common external dependency during prototyping. The full 500K context window is accessible from the first request, and cached input is billed at $0.15 per million once the trial ends. Signup is email-only with a 30-day expiry on the trial credits.
Free Access & Onboarding
- Trial credits at signup
- Email signup
- 30-day expiry
- Free web search included in trial
Cost After Free Tier
- Input: $2.10 / M tokens
- Output: $10.50 / M tokens
- Cache: $0.15 / M tokens
- 500K context
Upsides
- Trial covers latency-critical testing
- Free web search reduces external API costs during evaluation
- Cheapest cache rate in the list
Trade-offs
- Base rates mid-range
- 30-day expiry
Who Should Pick This
Voice, real-time chat, and completion-style products where TTFT needs to be measured directly.
7. Apertis
Platform Snapshot
Apertis’s free tier lets developers test both OpenAI-format and Anthropic-format requests against Grok 4.5 during the same trial period, which is unusual among reviewed providers. The trial includes free web search and the full 500K context window from the first request. Uptime is published at 100% over the trailing 90 days, giving teams a reliability signal before committing. Signup is email-only, and trial credits expire after 30 days, after which pricing lands at
2.40 input and 12.00 output per million.
Free Access & Onboarding
- Trial credits at signup
- Email registration
- 30-day expiry
- Both SDK formats accessible
Cost After Free Tier
- Input: $2.40 / M tokens
- Output: $12.00 / M tokens
- Free web search included
- 500K context
Upsides
- Anthropic SDK compatibility testable in the free tier
- 100% published uptime for evaluation reliability
- Free web search
Trade-offs
- Not the cheapest post-trial
- 30-day expiry
Who Should Pick This
Teams migrating from Claude who want to confirm code-path compatibility before committing.
8. Atlas Cloud
Platform Snapshot
Atlas Cloud offers trial credits alongside its multi-model catalog, so evaluation can span Grok 4.5 and other frontier models under the same account. The full 500K context is available immediately during the trial rather than being reserved for a paid tier. Signup requires email plus a verification step, adding some onboarding friction compared to email-only providers, and trial credits expire after 30 days. Post-trial pricing is 2.40 input and 12.00 output per million with standard cache pricing.
Free Access & Onboarding
- Trial credits at signup
- Email plus verification
- 30-day expiry
Cost After Free Tier
- Input: $2.40 / M tokens
- Output: $12.00 / M tokens
- Standard cache pricing
- 500K context
Upsides
- Multi-model access during trial
- Clean SDK experience
- 500K context
Trade-offs
- Verification adds friction
- No standout post-trial discount
Who Should Pick This
Developers who value a straightforward integration and want to compare Grok 4.5 against other hosted models within one billing account.
9. OpenRouter
Platform Snapshot
OpenRouter’s starter balance is small but has no expiry, which suits developers doing a slow, extended evaluation rather than a focused sprint. Free-tier requests still route across multiple upstream providers with full benchmark visibility, so latency, throughput, and per-provider uptime data are available from the first call. Multi-provider fallback is active during the trial as well, meaning evaluation reliability matches production behavior. Post-trial pricing tracks close to official xAI rates at roughly 3 input and15 output per million.
Free Access & Onboarding
- Small starter balance
- Email signup
- No expiry
- Full router functionality during trial
Cost After Free Tier
- Input: ~$3.00 / M tokens (weighted)
- Output: ~$15.00 / M tokens (weighted)
- Provider fallback active on trial
Upsides
- Benchmark data visible during evaluation
- Multi-provider failover from day one
- No expiry pressure
Trade-offs
- Starter balance is small
- Post-trial pricing near official rates
Who Should Pick This
Developers doing a slow, long-term evaluation who care more about routing quality than per-token cost.
10. Flaq.ai
Platform Snapshot
Flaq.ai’s free tier is minimal — enough to confirm the endpoint works, but not enough to run meaningful load tests. The real value shows up after the trial, at 0.30 input and 1.50 output per million, which effectively removes cost as a variable for text-only workloads. The trial itself expires after 14 days and covers only the text-only endpoint, since the platform does not support image inputs or advanced tool use. Signup is email-only, and integration goes through a standard OpenAI-compatible endpoint at 128K context.
Free Access & Onboarding
- Minimal starter credit
- Email signup
- 14-day expiry
- Text-only
Cost After Free Tier
- Input: $0.30 / M tokens
- Output: $1.50 / M tokens
- 128K context
Upsides
- Post-trial pricing effectively removes cost as a variable
- Simple to test end-to-end
Trade-offs
- Trial credit is small
- No multimodal features
- Fewer safety controls
Who Should Pick This
Batch text workloads where the free tier is a formality and the real question is whether the discounted post-trial pricing meets accuracy needs.
What We Learned
- Free credit amounts cluster around $3–$5 across most providers, with Flaq at the lower end and Kie.ai and AIML at the higher end; ApiPass takes a different approach, pairing a modest signup credit with a permanent 50%-off rate rather than a large one-time balance.
- Expiry windows matter more than headline credit size — a 14-day $3 credit and a 30-day $5 credit both usually get consumed, while ApiPass’s no-expiry credits remove the sprint pressure entirely.
- Post-trial cost trajectory often dominates: a $5 credit on a provider charging $3/$15 is worse than free credits on ApiPass, where every request lands at $1.00–$2.00 input and $3.00–$6.00 output per million for any sustained workload.
- Rebate-based models (GPTProto) shift the free tier onto commitment rather than signup, which suits some teams and not others.
Wrapping Up
- Hobbyists and students are best served by Kie.ai and AIML, where the free credits are large enough to run realistic experiments.
- Small teams planning to stay on Grok 4.5 long-term benefit more from platforms with permanent discounts, like ApiPass and Flaq.ai, where the free tier is a formality but ongoing costs stay low — ApiPass in particular preserves existing Grok CLI workflows without requiring an xAI account.
- Agent developers who need to test at scale gain more from Evolink.AI and WaveSpeed, where cache discounts amplify the effective free-tier value.
- Teams evaluating multiple models are best matched to AIML API and OpenRouter, whose free tiers extend across their catalogs.
