Cheap Gemini 4 Hydrogen API: APIMaster vs Google vs OpenRouter vs Vercel

Same Hydrogen model: APIMaster vs Google vs OpenRouter vs Vercel

The comparison below holds the model fixed. OpenRouter and Vercel use google/gemini-4-hydrogen; Google uses gemini-4-hydrogen. Public model catalogs are price references, not proof that every provider exposes the same tools, region, token limit or service tier.

Google's rate-limited free tier is useful for eligible evaluation; it is not unlimited paid capacity. Its invite-only Contributor tier quotes $0.75 / $3.75, but requires eligibility and permits product-improvement use under its terms. It should not be presented as an unconditional public Standard discount.

Google currently uses a flat Standard rate across Hydrogen's full 1M context window. That is a published current rate, not a permanent price-lock contract.

How much do 100 or 1,000 Hydrogen tasks cost?

Assume each task consumes 100,000 uncached input tokens and 20,000 billed output tokens, including thinking. This is a fixed-token estimate, not an executed benchmark or a claim that every task takes those tokens.

task cost = 0.1 × input price + 0.02 × output price

These figures exclude funding fees, taxes, search/grounding, tool environments, retries and other service charges. A failed or repeated call can still consume billable tokens. Compare the total charge per accepted result, not just the advertised input rate.

For comparison as different-model alternatives, current APIMaster Carbon or Argon starts at about $0.16683 per task, and 3.8 Flash about $0.04038, using the same token counts. Those estimates do not establish equal output quality, latency or task success. See the Carbon buying guide and Flash guide.

Fees, caching and thinking can change the cheapest choice

Platform fees: OpenRouter's public pricing page lists a 5.5% Standard credit-purchase fee; its FAQ documents payment-specific conditions. The fee applies to funding, not an extra token rate, so it is excluded from the task table. Vercel states zero token markup and no platform fee on tokens; optional services and regional or Priority pricing can still change a bill. Check payment method, service tier and the final quote before purchasing.

Caching: Google's Hydrogen implicit cache-read rate is $0.075 per million input tokens, with eligible prompts starting at 4,096 tokens. Hydrogen does not support explicit caching. If all 100,000 input tokens in the example were eligible cache hits, the input portion would be $0.0075 instead of $0.15, but thinking/output still costs extra. Cache hits and billed usage must be measured; do not promise this rate for every input token.

Thinking: Google's native default is high, with low, medium and xhigh available. OpenRouter's checked catalog advertises medium as its default. Explicitly set a supported reasoning level when comparing quality, time and cost; the same model name with different defaults is not a controlled workload comparison.

Built-in tools: Google bills processed thinking tokens and internal grounding instructions/function declarations. Search can add per-query charges. A compatible chat endpoint does not automatically reproduce native Search, computer use, long decode or implicit cache behavior.

How to prepare APIMaster access without buying the wrong model

Hydrogen is not yet available on APIMaster. Check current prices and availability on the model card. Discounted routes are rolling out.

For a Gemini model already available: register → create an API key → use https://apimaster.ai/v1 with the exact enabled model ID. The following example intentionally uses Carbon, not Hydrogen:

curl "https://apimaster.ai/v1/chat/completions" \
  -H "Authorization: Bearer $APIMASTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gemini-4-carbon","messages":[{"role":"user","content":"Review this retry-queue design and list the race conditions."}]}'

Before any migration, verify endpoint, tools, context, reasoning parameters and billing against the selected Carbon route. This example was not executed as a paid model test. When Hydrogen is listed, recheck its own route contract rather than changing only the string and assuming compatibility.

FAQ

Does APIMaster already sell a cheap Hydrogen API?

No public active Hydrogen route was listed at the November 13, 2026 check. Discounted routes are being rolled out. Carbon and Flash discounts do not apply to Hydrogen.

Is Hydrogen cheaper on OpenRouter or Vercel than on Google?

Their checked default token catalogs both quote $1.50 input and $7.50 output, matching Google Standard. Funding, regions, tools, service tiers and credits may change the final cost.

Can I get Hydrogen for half price?

Google Batch and Flex list $0.75/$3.75, and OpenRouter has a separate batch listing at those token rates. They are different execution modes. Google's Contributor offer is invite-only with different data-use terms.

Is Gemini 4 Hydrogen cheaper than Gemini 3.8 Flash?

Not at Google's current uncached Standard token rates. Flash's promotion is $0.75/$3.75 through December 31, 2026; Hydrogen is $1.50/$7.50. Workload efficiency may differ, and Flash's scheduled January price matches Hydrogen's current rate.

Does a Gemini application subscription include these API calls?

Do not assume it does. Consumer and coding-product subscriptions, direct Google API billing, OpenRouter credits, Vercel billing and APIMaster wallets are separate purchase paths with their own terms.

Sources and related comparisons

• Google Hydrogen pricing, model specification and migration/billing guide.
• OpenRouter model catalog, pricing and fee FAQ.
• Vercel model catalog and pricing.
• APIMaster live Hydrogen card, checked November 13, 2026.
• Hydrogen overview · Hydrogen vs Sonnet 5.5 vs Terra · broader same-model platform price comparison.