Best GLM 5 API Provider in 2026: GLM-5.3 Prices Across 8 Routes

Quick answer: For most teams, the best GLM 5 API provider is Z.ai's own API: GLM-5.3 costs $1.40 input, $0.26 cached input and $4.40 output per 1M tokens, with the full 1M-token context. If you only care about the lowest per-token bill, DeepInfra's promotional rate ($0.563 / $2.50) and Fireworks' Spot tier ($0.98 / $3.08) undercut it, and OpenRouter lets you route across 37 GLM-5.3 hosts. glm5.app (our service) is not the cheapest per token; it is the option for one key and one balance across GLM and other models, with card, Apple Pay, Alipay and WeChat Pay top-ups.

Every price below was read from each provider's own pricing or model page on November 5, 2026. We did not run our own latency benchmarks; where speed matters, we point to OpenRouter's live provider stats instead of inventing numbers.

Who this comparison is forCopy Anchor Link

You already decided on GLM-5.x. The question is where to send the request. Searching "who is the cheapest GLM-5 API provider" gives you a dozen hosts, each with a different price, quantization, cache rule and payment flow, and a Coding Plan that looks like an API but is not one. This page puts every route on the same eight dimensions so you can pick in a few minutes, and it says plainly when our own product is the wrong choice.

How we picked and rankedCopy Anchor Link

A route made the list only if its official pricing or model page showed a GLM-5.x price today. We then compared:

1. Price per 1M input and output tokens for GLM-5.3
2. Cached-input price (this decides the bill for agents and long chats)
3. Context limit
4. Which GLM-5.x model IDs are offered
5. How you pay
6. OpenAI-compatible endpoint or not
7. Best fit
8. Main limitation

Hosts listed only on third-party aggregators were left out. If you are new to the model family, our GLM 5 API guide covers setup and model IDs first.

GLM-5.3 API price comparison (checked November 5, 2026)Copy Anchor Link

Two patterns stand out. First, most direct hosts simply match Z.ai's $1.40 / $4.40 list rate; the real price differences come from promotions, Spot capacity and quantization. Second, cached input is where bills diverge: a route that bills every repeated token at the full input rate can cost far more on an agent loop than its headline price suggests.

The 8 GLM 5 API routes, one by oneCopy Anchor Link

1. Z.ai API: best default for most buildersCopy Anchor Link

• Price: GLM-5.3 at $1.40 / $0.26 cached / $4.40. GLM-5.3-Flash at $0.15 / $0.03 / $0.50. GLM-5.3-FlashX at $0.37 / $0.075 / $1.25. GLM-5.2 matches GLM-5.3; GLM-5 is $1 / $0.20 / $3.20. Cached-input storage is marked free for a limited time.
• Models: The full family, including GLM-5.1 and GLM-5.3-FlashX-Legal.
• Endpoint: OpenAI-style https://api.z.ai/api/paas/v4, plus Responses and Anthropic-style protocols.
• Best for: Production apps that want first-party pricing, the 128K output ceiling and reasoning_effort (low, high, max) exactly as documented.
• Limitation: One vendor, one model family. If you also call Kimi, DeepSeek or GPT models, you manage separate accounts and balances.

The official Z.ai pricing table is the reference every other host is measured against. For the full arithmetic, see our GLM 5.3 pricing breakdown.

2. Z.ai GLM Coding Plan: best for coding agents, not for appsCopy Anchor Link

• Price: Lite $18, Pro $80 and Max $168 per month, with 30% off on yearly billing. Lite includes 10,000 credits per week; Pro is 6x Lite usage and Max is 14x.
• Models: GLM-5.3 and GLM-5.3-Flash inside supported tools such as Claude Code, Codex, OpenCode and Cursor.
• Best for: Developers who live in a coding agent all day. Off-peak calls, including all day on weekends, use 50% of standard credits.
• Limitation: It is a separate product with its own keys and endpoints. It is not a general API balance for your backend. Our GLM 5.3 Coding Plan guide explains the credit math.

3. OpenRouter: best for routing and price shoppingCopy Anchor Link

• Price: OpenRouter's GLM-5.3 page lists 37 providers. Posted rates run from $0.0699 / $1.40 (Wafer, fp4) to $2.80 / $8.80 (Alibaba's priority tier). The Z.AI endpoint itself is $1.40 / $4.40 / $0.26 cached. Some hosts were running time-limited discounts on the day we checked, including GMICloud and SiliconFlow at 50% off ($0.70 / $2.20).
• Models: z-ai/glm-5.3, z-ai/glm-5.3-flash, z-ai/glm-5.2, z-ai/glm-5 and more.
• Payment: Card, crypto and more; the Standard plan adds a 5.5% platform fee on purchases.
• Best for: Teams that want automatic fallback across hosts, or a "Floor" (cheapest) routing mode.
• Limitation: The cheapest listings are often fp4-quantized or promotional, and prices move week to week. Pin providers if output consistency matters. Our GLM 5.3 on OpenRouter walkthrough shows how.

4. Fireworks: best for a Spot discount on a direct hostCopy Anchor Link

• Price: Standard serverless $1.40 / $0.26 / $4.40. Spot $0.98 / $0.182 / $3.08. Priority $1.75 / $0.325 / $5.50. GLM-5.3-Flash is $0.15 / $0.03 / $0.50.
• Model ID: accounts/fireworks/models/glm-5p3.
• Best for: Batch or retry-tolerant workloads that can use Spot capacity, plus teams that want fine-tuning or dedicated deployments later.
• Limitation: Usage draws down prepaid credits, and Spot is not the same service level as Standard.

5. Together AI: best for teams already on TogetherCopy Anchor Link

• Price: GLM-5.3 $1.40 / $0.26 / $4.40; GLM-5.2 the same; GLM-5.3-Flash $0.15 / $0.03 / $0.50.
• Best for: Existing Together customers who want GLM next to their other open models, with provisioned throughput as an option.
• Limitation: No discount versus Z.ai's list rate on serverless.

6. DeepInfra: lowest direct list price we verifiedCopy Anchor Link

• Price: GLM-5.3 at $0.563 input / $0.125 cached / $2.50 output, shown as a promotion with 38% off the regular $0.90 / $0.20 / $4.00. A Flex tier drops that to $0.45 / $0.10 / $2.00.
• Details: fp4 weights, 1,048,576-token context, zero-retention option.
• Best for: Cost-sensitive production traffic that is fine with a quantized deployment.
• Limitation: Promotional pricing can end; budget at the regular rate.

7. SiliconFlow: best for older GLM-5 IDsCopy Anchor Link

• Price: GLM-5.3 $1.4 / $0.26 / $4.4. GLM-5.2 $1.302 / $0.26 / $4.092. GLM-5 $0.95 / $0.20 / $2.55 with a 205K context.
• Best for: Projects still running GLM-5 or GLM-5.1 that want them cheaper than Z.ai's own GLM-5 rate.
• Limitation: Direct GLM-5.3 pricing is list rate; the 50% discount we saw was on SiliconFlow's OpenRouter listing, not its own pricing page.

8. glm5.app: best for one key across GLM and other modelsCopy Anchor Link

• Price: glm-5.3 and glm-5.2 at $1.40 / $4.40, the same as Z.ai's list rate. glm-5.3-flash at $0.075 / $0.25.
• Endpoint: OpenAI-compatible Chat Completions and Responses at https://glm5.app/api/v1.
• Payment: Pay-as-you-go packs from $12 that never expire, or monthly plans. Cards, Apple Pay, Google Pay and Link; Alipay and WeChat Pay on one-time packs.
• Best for: Individuals and small teams who want GLM-5.3, GLM-5.3 Flash, Kimi, DeepSeek and other models on one key and one balance, plus a web chat on the same account.
• Limitation: We are a third-party service, not Z.ai. There is no cached-input discount, every request costs at least one credit ($0.018), and API access unlocks after your first purchase. Our glm-5.3-flashx ($1.85 / $6.25) and glm-5 ($1.50 / $5.00) are priced above Z.ai's direct rates, so use Z.ai for those.

If one balance is the point: create a key once and call GLM-5.3, GLM-5.3 Flash and the rest through the same OpenAI client. The API quickstart takes about five minutes, and pay-as-you-go packs never expire.

Worked example: one month of a cache-heavy agentCopy Anchor Link

Assume a coding agent sends 10M input tokens a month, 6M of them cache hits, and gets 1M output tokens back on GLM-5.3. Using each provider's published rates:

That is the honest picture: for heavy agent traffic with lots of repeated context, glm5.app is the most expensive route on this list. Without caching (say 10M fresh input and 1M output), Z.ai, Together, SiliconFlow and glm5.app all land at the same $18.40, and the choice comes down to payment and how many models you need.

Which GLM 5 API provider should you choose?Copy Anchor Link

• You want the official model, full features, lowest risk: Z.ai API.
• You only code inside an agent tool: the GLM Coding Plan, not the per-token API.
• You want the lowest per-token price and accept fp4 or promotions: DeepInfra, or OpenRouter's Floor routing.
• You want failover across many hosts: OpenRouter.
• You run batch jobs that tolerate interruptions: Fireworks Spot.
• You still run GLM-5 (not 5.3): SiliconFlow or OpenRouter's cheaper GLM-5 hosts.
• You want one key for GLM plus other models, Alipay or WeChat Pay, and no subscription: glm5.app.
• You mainly want cheap GLM-5.3 Flash: our $0.075 / $0.25 is half of Z.ai's list rate, though OpenRouter shows a few hosts lower still. See GLM 5.3 Flash pricing for the comparison.

FAQCopy Anchor Link

Who is the cheapest GLM-5 API provider?Copy Anchor Link

On November 5, 2026, the lowest GLM-5.3 price posted on OpenRouter was Wafer at $0.0699 input and $1.40 output per 1M tokens, on fp4 weights. Among direct provider pages we checked, DeepInfra's promotional $0.563 / $2.50 was lowest. Cheapest changes often, so recheck before committing.

What is the best API for GLM-5?Copy Anchor Link

Z.ai's own API is the best default because it sets the reference price, supports cached input at $0.26 and documents every GLM-5.x model. Pick another route only for a specific reason: lower price, failover, or one balance across vendors.

How much does GLM-5.3 cost on Fireworks?Copy Anchor Link

Fireworks lists GLM-5.3 at $1.40 input, $0.26 cached input and $4.40 output per 1M tokens on Standard serverless, $0.98 / $0.182 / $3.08 on Spot, and $1.75 / $0.325 / $5.50 on Priority.

Is the GLM Coding Plan an API provider?Copy Anchor Link

Not in the usual sense. It is a monthly credit plan for coding tools with its own keys and endpoints. Apps and backends should use the per-token API.

Is glm5.app cheaper than Z.ai for GLM-5.3?Copy Anchor Link

No. Our GLM-5.3 rate is the same $1.40 / $4.40 list price, and we do not discount cached input. The reasons to use it are one key across many models, flexible payment and packs that never expire.

Do all providers serve the same GLM-5.3?Copy Anchor Link

They serve the same open-weight model, but hosts run different quantizations (fp4, fp8 and others) and output limits. OpenRouter shows the quantization and live latency for each host.

Start buildingCopy Anchor Link

If Z.ai direct fits your stack, go there; it is the reference price. If you would rather keep GLM-5.3, GLM-5.3 Flash and other models on one OpenAI-compatible key, start with the glm5.app API docs and choose a plan or pack that fits your usage.

SourcesCopy Anchor Link

• Z.ai pricing — Official GLM-5.3, GLM-5.3-Flash, FlashX, GLM-5.2 and GLM-5 token rates and cached-input prices, checked November 5, 2026.
• Z.ai GLM-5.3 model page — 1M context, 128K output, reasoning effort levels and API protocols.
• Z.ai GLM Coding Plan — Lite, Pro and Max prices and usage multiples.
• OpenRouter GLM 5.3 — Provider count, per-host prices, quantization and live latency; platform fee from OpenRouter's pricing page.
• Fireworks pricing — Standard, Spot and Priority GLM-5.3 rates.

Prices change frequently, especially promotions and OpenRouter listings. Treat this table as a snapshot from November 5, 2026 and confirm on each provider's page before you commit budget.