Best offer on record: Gemini API Free Tier (Google AI Studio). 6 verified findings, checked 2026-10-22.
Offers
Gemini API Free Tier (Google AI Studio) high confidence
Free input AND output tokens, no billing account or credit card required. New accounts start on the Free tier automatically; qualification = an active GCP project or free trial, no spend-based cap. Free-tier models (official pricing page, fetched 2026-10-22): Gemini 3.8 Flash, 3.6 Flash, 3 Flash Preview, Gemini 3.5 & 3.1 Flash-Lite (all service tiers), Live/audio models (3.8 Live, 3.5 Transcribe, 2.5 Flash Native Audio), TTS (3.8 Flash TTS, 3.8 Flash-Lite TTS, 2.5 TTS previews), Gemini Embedding 2 (Standard tier only), Gemma 4 (all capabilities incl. tuning), and Robotics ER 2 previews. Context caching free on 3.8/3.6 Flash and Gemma 4. Limits are per-project RPM/TPM/RPD (RPD resets midnight Pacific); the docs no longer publish static per-model numbers — exact quotas are shown live in the AI Studio dashboard for your project. Free tier is indefinite, no renewal mechanism.
Eligibility
Anyone with a Google account + an active Google Cloud project; no billing account, no card, no .edu, no startup status. Region: Gemini API availability is limited to Google's supported-countries list (list not re-verified today).
How to claim
1) Sign in at aistudio.google.com with a Google account; 2) select/create an active GCP project; 3) an API key is auto-provisioned and the Free tier applies automatically — nothing to enable. To upgrade later: link a billing account and prepay a minimum of $5 (new 2026 paid flow).
Expiry
No expiry/renewal — free tier is permanent; per-model quotas are live in AI Studio. Note: free tier is 'limited access to certain models' — Pro/image/video models are NOT free-tier eligible.
Gotchas
Free-tier prompts and responses ARE used by Google to improve products (only paid tiers, except invite-only Contributor, exclude your data from product use). Gemini 3.1 Pro Preview, Gemini 4 Argon, Omni Flash, 3 Pro Image, Nano Banana 2/2.1/Lite, 2.5 Pro, Veo 3.1, Lyria 3.x are NOT free-tier eligible. 2.5-generation models are access-restricted to prior active users; new projects are told to use 3.5 Flash-Lite or 3.8 Flash. Static per-model RPM/TPM/RPD figures were removed from the docs — verify quotas in AI Studio. Model lineup churns fast (see deprecations).
Google Cloud Free Trial — $300 credit for new customers high confidence
$300 USD of free GCP credit for new customers ('You won't be charged until you activate your full paid account') — usable for Vertex AI / Gemini model calls, AI app building, agents. Separately: 20+ products with always-free monthly limits (e.g. 1 e2-micro VM, 5 GB Cloud Storage, BigQuery monthly quota, 'AI APIs' free usage) that do not draw from the $300 and never expire ('the free usage limit does not expire, but is subject to change'). Also listed on the same page: GKE full-capability 90-day trial, Cloud SQL 30-day trial (8 vCPU Enterprise Plus instance, 64 GB RAM, 100 GB storage), and a 30-day free trial of Gemini Enterprise Plus (the agentic enterprise platform). Core terms read from the page today (high); exact card requirement and 90-day credit duration live in the sign-up flow (medium sub-parts, flagged in gotchas).
Eligibility
New Google Cloud customers only (one trial per person; household/organizational duplicates are detected and denied). A payment method is required at sign-up (card/PayPal; standard verification hold) — unlike the Gemini API free tier this one DOES need a card. Trial duration for the $300 credit is not stated on the marketing page (historically ~90 days; verify in the sign-up flow).
How to claim
1) Go to cloud.google.com/free; 2) sign up for Google Cloud and add a payment method; 3) the $300 credit is granted automatically to the new billing account — no coupon. Use it on Vertex AI/Gemini workloads; the separate always-free tiers apply on top.
Expiry
Credit expires at end of trial window if unused (duration stated in sign-up flow); always-free tiers: no expiry, subject to change. No auto-renewal — continuing requires activating a paid account.
Gotchas
Card required (vs. zero-card Gemini API free tier). GCP Marketplace third-party SKUs excluded from credit. After trial end, if a payment method is on file and you continue using billable services, you will be charged — cancel or switch the account if you don't want that. The $300 credit covers GCP/Vertex AI charges; it is a different entitlement from the free Gemini API (ai.google.dev) tier.
Google for Startups Cloud Program (startups) high confidence
Rebranded/expanded program: up to $200,000 USD in GCP credits (up to $350,000 for AI startups) over two years, plus credits for frontier models (Gemini, Gemma), 12 months of Google Workspace Business Plus at no extra cost, monthly Google Maps Platform credits, dedicated technical support, and accelerator residencies. Tier structure (official FAQ): 'Start ($2k)' tier = $2,000 credits, for startups founded in the past 2 years with a working MVP, a clear business model, and plans to seek venture funding. Funded tiers 'Scale' and 'Scale AI' = $200K–$350K credits, for startups with VERIFIABLE Pre-Seed to Series A funding. Credit mechanics (footnote on the page): AI startups get Year 1 100% coverage up to $250,000 + Year 2 20% coverage up to an additional $100,000; non-AI startups Year 1 100% up to $100,000 + Year 2 20% up to an additional $100,000. Targeted at 'new Google Cloud customers founding digital-native products'.
Eligibility
For-profit startup, digital-native product, new Google Cloud customer. Excluded: companies that have IPO'd or been acquired, educational institutions, government entities, nonprofits, personal blogs/content, dev shops, consultancies/agencies, cryptocurrency mining, direct competitors/resellers of GCP. Scale/Scale AI tiers: venture funding must be verifiable Pre-Seed to Series A; non-VC funding (private equity, bank loans, government grants, crowdfunding, friends & family) does NOT qualify for Scale — such startups 'may be evaluated for other program tiers' (i.e., typically the $2,000 Start tier). No hard dollar funding cap stated; stage cap is Series A. Stealth/unfunded founders must wait until product launch and need a working website. Company domain must not have had a paid Google Workspace plan within 31 days of applying. Acceptance at sole discretion of Google Cloud.
How to claim
1) Apply at cloud.google.com/startups ('Apply now' form: company info, funding stage, accelerator affiliations, use case); 2) acceptance/rejection email typically within 5–7 days (10+ if info missing); 3) credits provisioned to your GCP project on acceptance; the Workspace Business Plus and Maps credits are separate application items ('Separate application required').
Expiry
Two-year program: Year 1 = 100% of eligible spend up to cap ($250K AI / $100K non-AI); Year 2 = 20% of additional spend up to +$100K. No renewal; alumni can re-apply after completion.
Gotchas
Year-2 credits are 20% coverage, not 100% — the 'up to $350K' assumes heavy Year-2 eligible spend. Third-party (non-Google) models are billed directly and NOT covered by program credits. Bootstrapped/self-funded startups realistically get only the $2,000 Start tier without verifiable VC money. The '5–7 days' decision clock is typical, not guaranteed.
Google Cloud Research Credits ('Academic Research Grants') — up to $5,000 high confidence
GCP research credits to advance academic work. Amount advertised: 'Apply for up to $5,000 in Google Cloud credits' (researcher card on the Google Cloud for Education hub). Formal terms on the application page: 'Credit awards must be activated within 60 days of the project start date indicated in the application form. Credit awards expire 365 days from the coupon redemption date, or when the credit amount has been fully used, whichever comes first.' Credits 'do not have commercial value and may not be sold or bartered.' A GCP billing account is required to use the credits.
Eligibility
Limited to faculty, PhD students, and postdoctoral researchers at accredited higher-education institutions and eligible nonprofit research institutions in APPROVED COUNTRIES (region-limited). Institutional email account required; .edu is the typical but not only qualifying domain (nonprofit research institutions also qualify).
How to claim
1) Apply via the form at edu.google.com/programs/credits/research (institutional email, project details, grant ID, funding plan for after the 1-year credit expiry); 2) on approval, redeem the coupon in the Google Cloud console (billing account required); 3) activate within 60 days of project start.
Expiry
Credits: 365 days from coupon redemption or full use, whichever first; must activate within 60 days of project start. No auto-renewal — reapply for new projects/years.
Gotchas
Requires a GCP billing account (payment method on file), so it is NOT zero-card like the Gemini API free tier. Not for teaching — separate 'Teaching Credits' program. 'Approved countries' restriction may exclude some regions. Credits are research-only, not transferable/sellable.
Google Cloud Teaching Credits (faculty) medium confidence
GCP credits for faculty to give students hands-on cloud experience: 'Apply for GCP credits for you and your students to give them real, hands-on experience with Google Cloud Platform. It is the intent of the program that the credits are used by students to learn about how to use the cloud.' Application covers 1–3 courses per entry (different courses/time periods listed separately); form captures institution, department, course name, expected course start date, and a link to your school's faculty directory profile. Program is advertised alongside 'up to $5,000 in Google Cloud credits' on the Google Cloud for Education hub; the exact per-course credit amount is not printed on the application page (hence medium confidence).
Eligibility
Faculty ONLY ('Eligibility is limited to faculty only. If you are a student, you can encourage your faculty members to apply for your next course.') Requires an academic institution (US states list on the form; international institutions via the academic-institution field).
How to claim
1) Faculty apply via the form at edu.google.com/programs/credits/teaching (institution + 1–3 courses with start dates); 2) on approval, students use the GCP credits for course work; 3) review the program FAQ on the page for current amounts.
Expiry
Per program terms (not printed on the fetched page; typically tied to the course term — confirm in the FAQ). No auto-renewal; reapply each course/year.
Gotchas
Students cannot apply for themselves — the faculty member must apply. Credits are intended for learning use only. Amount is not stated on the application page, unlike the research program's 'up to $5,000'.
Gemini for Education (free education AI license) high confidence
Google's education-license front: 'Gemini for Education' — Gemini (premium Gemini 2.5 Pro with LearnLM 'world's leading model for learning' claims) delivered free of charge to educators, students, and staff: 'Your institution can get Gemini for Education at no cost by signing up for Google for Education Fundamentals, even if you use a different primary productivity suite,' and 'Gemini for Education is also included in all Google Workspace for Education editions free of charge.' Included in the free offering: default access to premium AI models 'with significantly higher limits than what consumers get at no cost,' limited-access Deep Research, custom Gems ('AI experts' per topic), Gemini Canvas, Gemini Live, Gemini Notebook (documents-to-podcasts), enterprise-grade data protection — 'Data is not human reviewed or used to train AI models' (Core Service under Workspace for Education terms).
Eligibility
K-12 and higher-education institutions (school/university domain; 'Google for Education Fundamentals' sign-up, or any Google Workspace for Education edition). Not an individual-offering — the institution signs up and admins enable the Gemini app. No payment method required. The upsell 'Google AI Pro for Education' (expanded premium-model access + full Gemini across Workspace apps, Gmail/Meet/Docs) is a paid add-on, contact-sales pricing.
How to claim
1) Institution signs up for Google for Education Fundamentals (free, edu.google.com) even if another suite is primary, and admin enables ONLY the Gemini app; 2) or it is already bundled in a Workspace for Education license; 3) educators/students sign in with their school Google account to gemini.google.com / Gemini mobile app.
Expiry
Not a credit — it persists as long as the (free) GFE Fundamentals membership or the institution's Workspace for Education license is active; annual license renewal applies to paid GWE editions. No separate renewal for the free app.
Gotchas
Free tier is 'limited access' to Deep Research vs. the paid Google AI Pro for Education add-on (expanded limits + full in-Workspace Gemini). Consumer 'Gemini Free' at gemini.google.com is a separate, lower-limited product — the education version needs the institutional sign-up. Admin-managed: usage/rollout is controlled by school IT. LearnLM claims are Google marketing, not benchmarks.
WebSearch was unavailable for this agent (shared session budget exhausted); all findings above were read directly from official Google pages fetched 2026-10-22 (cloud.google.com/startups, cloud.google.com/free, cloud.google.com/edu, ai.google.dev pricing/billing/rate-limits/deprecations, edu.google.com credits pages), so 'high' confidence means the page was read today. Programs materially changed in 2025–2026: (1) The startup program was restructured into tiered 'Start ($2k) / Scale / Scale AI' with the headline raised from the old 'up to $200K' framing to 'up to $200K (up to $350K for AI startups) over two years', and large credits now REQUIRE verifiable Pre-Seed to Series A VENTURE funding — bootstrapped/self-funded startups are effectively capped at the $2,000 Start tier unless re-evaluated; non-VC money (PE, bank loans, grants, crowdfunding, friends & family) no longer qualifies for Scale. Year-2 credits are only 20% coverage up to +$100K. (2) Gemini API free-tier model lineup churn: official deprecation page (last updated 2026-10-20) — Gemini 2.0 Flash & 2.0 Flash-Lite shut down Jun 1, 2026; 3.1 Flash-Lite Preview May 25, 2026; 3 Pro Preview Mar 9, 2026; 2.5 Pro previews Dec 2, 2025; Imagen 4 Aug 17, 2026; Veo 3.1 & Omni Flash Preview shut down Oct 22, 2026 (today); 2.5 Flash Image stable Mar 15, 2027; 3.1 Flash-Lite stable May 7, 2027; text-embedding-004 Jan 14, 2026 (→ Gemini Embedding 2). 2.5-generation models are access-restricted to prior active users with no announced shutdown. (3) Docs no longer publish static free-tier RPM/TPM/RPD — quotas are per-project and shown live in the AI Studio dashboard only. (4) Paid-tier billing flow changed 2026: minimum $5 prepay to enter paid tiers; 'Postpay temporarily until Prepay system propagates, starting March 23, 2026'; upcoming paid price doublings Dec 1, 2026 (Gemini 4 Argon) and Jan 1, 2027 (3.8/3.6 Flash, TTS, robotics) — relevant when free-tier users upgrade. (5) GCP free trial marketing now leads with AI ($300 credit usable for Gemini/Vertex; new 30-day Gemini Enterprise Plus trial, GKE 90-day trial, Cloud SQL 30-day trial); the trial's exact day-count for the $300 credit is not printed on the public page.
Critic corrections
Google Gemini API (AI Studio) Free Tier: Partly stale. Google's pricing page now describes the free tier as limited access to certain models, with free input and output tokens. Free-tier RPM and RPD figures are no longer published; limits are shown in AI Studio. The Sept 2026 changelog limits 2.5-series access to users who used those models before and tells new projects to use 3.5 Flash-Lite or 3.8 Flash. Gemini 4 Argon is not on the free tier.
Gemini API Free Tier (Google AI Studio): Same change as the AI Studio entry. Free-tier limits are not published in Google's docs and 2.5-series access is restricted to returning users (changelog, Sept 2026).