Best CometAPI Alternatives in 2026: 5 Options Compared

CometAPI is a unified gateway: one OpenAI-compatible key reaches 500+ models across text, image, video, and audio, priced at least 20% below the providers' official rates^[1]. It is a clean pitch in a crowded category. Teams comparing CometAPI alternatives usually want one of a few things: pass-through pricing where they pay the exact provider rate, the option to own inference or fine-tune, deeper media and video coverage, or a specific model CometAPI does not carry.

This guide compares five CometAPI alternatives on what moves a decision: model range, pricing model, integration effort, and where each one beats CometAPI. Four are independent platforms. The fifth is reAPI, which we build. Both reAPI and CometAPI are unified, OpenAI-compatible gateways priced below official rates, so I will be specific about the real differences rather than pretend they are far apart. Every figure below came from each vendor's own pricing page or docs on May 30, 2026.

TL;DR

• CometAPI unifies 500+ models behind one OpenAI-compatible key at roughly 20% below official rates, with pay-as-you-go credits that do not expire^[1].
• OpenRouter is the pass-through option: 400+ models across 60+ providers at provider rates, plus a 5.5% credit-purchase fee, with free model variants^[2][3].
• WaveSpeed is a speed-first unified API with 1,000+ models, but a $1 trial and prepayment-gated throughput^[4].
• Together AI owns its open-model inference and fine-tuning; Replicate owns the widest custom-model catalog^[6][8].
• reAPI is the curated-media unified pick: 200+ models with deeper video generation and a transparent credit unit.

What CometAPI does well, and where it leaves gaps

CometAPI's strength is consolidation with a built-in discount.

Where it is strong:

• One key for 500+ models. Text, image, video, and audio through a single OpenAI-compatible endpoint^[1].
• A flat discount. Models are priced at least 20% below official vendor rates, stated as "customer price = official x 0.8"^[1].
• Credits that last. Pay-as-you-go with no subscription and no minimum, and unused credits carry forward indefinitely^[1].
• Easy entry. Test credits at signup, no credit card required^[1].

Where teams hit walls:

• Self-reported reliability. The 99.9% uptime and response-time figures are CometAPI's own numbers, not audited benchmarks^[1].
• A fixed discount, not the floor. The roughly 20% cut is off official rates; for some open models, a pass-through router can reach a cheaper third-party provider instead^[3].
• No fine-tuning or self-hosting. It is an aggregation layer, so training and dedicated deployment live elsewhere.
• Unpublished free amount. The trial is "test credits," with no documented dollar figure^[1].

How to evaluate a CometAPI alternative

Five questions sort the field:

• Pricing shape. A flat discount off official, pass-through provider rates, or your own compute?
• Model reach. Does it carry the exact models you need across modalities?
• Media depth. Is video generation a first-class feature or an afterthought?
• Train vs. call. Do you need fine-tuning or dedicated hosting?
• Entry cost. A real free balance, or a token trial?

The best CometAPI alternatives in 2026

1. OpenRouter: best for pass-through pricing and breadth

OpenRouter is the largest aggregator and the transparency option: you pay the provider's rate, not a repriced one^[2].

• Features: 400+ models across 60+ providers behind one OpenAI-compatible key, with provider routing, free model variants, and bring-your-own-key support^[2][3].
• Pricing: Pass-through at the provider's own rate, plus a 5.5% ($0.80 minimum) fee on credit purchases. Rates vary by provider, for example Claude Opus 4.8 at $5 in / $25 out^[3].
• Performance: Depends on the routed provider; the schema is normalized across them.
• Best for: Teams that want provider-exact pricing and the widest model reach.
• Vs CometAPI: OpenRouter pays provider rate plus a credit fee; CometAPI prices a flat 20% below official with no purchase surcharge. Which is cheaper depends on the model.

2. WaveSpeed: best for speed-first media

WaveSpeed is another unified, OpenAI-compatible gateway, tuned for low latency on media^[4].

• Features: 1,000+ models across image, video, audio, 3D, and language, with sub-second latency claims and Python and JavaScript SDKs^[5].
• Pricing: Pay-per-use, for example Seedance 2.0 Fast at $0.10/second and Nano Banana 2 at $0.07/image. New accounts get $1 in trial credits^[4].
• Performance: Advertises zero cold starts and images in under two seconds^[5].
• Best for: Latency-sensitive media workloads.
• Vs CometAPI: WaveSpeed leans on raw speed and a larger catalog; throughput is gated behind prepayment tiers rather than a flat discount^[5].

3. Together AI: best for open models and fine-tuning

Together AI owns its inference rather than reselling, with fine-tuning on top^[6].

• Features: 176 open-weighted models, per-token serverless, dedicated GPUs, fine-tuning, and an OpenAI-compatible API^[6][7].
• Pricing: Per-token, for example Llama 3.3 70B at $0.88 per million, with dedicated H100s at $6.49/hour. No free trial, $5 minimum^[6].
• Performance: Strong for open-model chat, vision, and reasoning.
• Best for: Open-source-first teams that fine-tune.
• Vs CometAPI: Together runs its own inference and training; CometAPI aggregates closed and open models without training.

4. Replicate: best for custom models

Replicate hosts the widest catalog and lets you ship your own model^[8].

• Features: Thousands of community models, per-second hardware inference, fine-tuning, and Cog packaging^[8].
• Pricing: Hardware per-second, for example A100 80GB at $5.04/hour, or per-output like FLUX 1.1 Pro at $0.04/image^[8].
• Performance: Flexible, with cost tied to runtime.
• Best for: Teams that need a niche model or a custom deploy.
• Vs CometAPI: Replicate is built for custom and community models; CometAPI is a curated commercial catalog.

5. reAPI: best for curated media and transparent credits

reAPI is a unified, OpenAI-compatible gateway priced below official rates, with a deeper curated video catalog and a transparent credit unit at 1 credit = $0.001.

• Features: 200+ models with deeper video generation (Veo 3.1, Seedance 2.0, Wan 2.7, Kling, HappyHorse 1.0) plus frontier LLMs (GPT-5, Claude Opus 4.8, Gemini) and image models (GPT-Image-2, Gemini 3 Pro Image). Chat is OpenAI-compatible; image and video run on REST endpoints under the same key.
• Pricing: Pay-as-you-go credits at 1 credit = $0.001, so the unit is explicit, at 20-50% below official rates. Media is flat per-output, for example GPT-Image-2 from $0.0066/image, Seedance 2.0 from $0.0506/video, and Veo 3.1 Fast from $0.207/generation. Free credits to start.
• Performance: Same upstream frontier models; the win is a tighter media catalog and a clear price unit.
• Best for: Teams that want a unified gateway with serious video generation and a transparent per-credit cost.
• Vs CometAPI: reAPI matches the unified, OpenAI-compatible, below-official model and adds a deeper curated video catalog (Veo 3.1, Seedance 2.0, Wan 2.7, Kling) plus an explicit credit unit at 1 credit = $0.001.

CometAPI vs. the top alternatives at a glance

Catalog and pricing figures are from each vendor's official pages as of May 2026; rates change, so confirm before you commit.

What the numbers say about pricing

CometAPI, OpenRouter, and reAPI are all unified gateways, but they price differently, and the cheapest one is model-dependent.

• CometAPI prices a flat 20% or so below each provider's official rate, with no purchase surcharge and credits that do not expire^[1].
• OpenRouter passes the provider's exact rate through unchanged, then adds a 5.5% ($0.80 minimum) fee when you buy credits, so a cheap third-party provider can win on open models while the fee eats into small top-ups^[3].
• reAPI uses an explicit credit unit, 1 credit = $0.001, at 20-50% below official rates, with free starting credits.
• WaveSpeed is pay-per-use but gates throughput behind prepayment tiers; Together is per-token with a $5 minimum^[5][6].

The honest read: against CometAPI, the deciding factors are usually catalog fit and media depth, not a few percent of token cost. Compare the specific models you call, not the headline discount.

Moving from CometAPI to reAPI

Because both speak the OpenAI format, switching text calls is a base-URL change, and media moves to reAPI's REST endpoints:

from openai import OpenAI

client = OpenAI(
    base_url="https://api.reapi.ai/v1",
    api_key="YOUR_REAPI_KEY",
)

resp = client.chat.completions.create(
    model="claude-opus-4-8",
    messages=[{"role": "user", "content": "Rewrite this paragraph for clarity."}],
)

Image and video run on REST endpoints under the same base URL and key. Since both are pay-as-you-go, the low-risk move is to run a real workload through each and compare invoices and model coverage before you consolidate.

FAQ

Is CometAPI legit?

CometAPI is a working unified gateway for 500+ models at below-official pricing^[1]. Its reliability statistics are self-reported rather than independently audited, which is worth noting but common for the category. The reasons to compare CometAPI alternatives are usually catalog fit, media depth, or a preference for pass-through pricing.

What is the difference between CometAPI and OpenRouter?

CometAPI prices each model around 20% below its official rate with no purchase surcharge. OpenRouter passes the provider's exact rate through unchanged, then charges a 5.5% ($0.80 minimum) fee on credit purchases^[1][3]. CometAPI is cheaper on models where the official rate is the reference; OpenRouter can be cheaper where a budget third-party provider hosts an open model.

Which CometAPI alternative is best for video?

reAPI and WaveSpeed both carry serious video catalogs. reAPI lists curated models like Veo 3.1, Seedance 2.0, and Wan 2.7 with flat per-video pricing; WaveSpeed leans on low-latency generation^[4].

Which CometAPI alternative is OpenAI-compatible?

OpenRouter, WaveSpeed, Together AI, and reAPI all expose OpenAI-compatible APIs, so you reuse an existing client by changing the base URL^[2][5][7]. Replicate uses its own predictions API.

Can I fine-tune models on a CometAPI alternative?

Yes. Together AI and Replicate both support fine-tuning, and RunPod or Hugging Face let you train on your own infrastructure^[6][8]. CometAPI itself is a hosted-inference gateway rather than a training platform.

Choosing a CometAPI alternative

CometAPI does the unified-gateway job well: one key, 500+ models, a flat discount off official rates. The case for a CometAPI alternative is rarely the headline price and usually the specifics: pass-through transparency, the option to fine-tune, or deeper video generation. OpenRouter wins on provider breadth and pass-through pricing, WaveSpeed on latency, Together AI on open-model training, and Replicate on custom models. If you want a unified, OpenAI-compatible gateway with a curated media catalog and a transparent per-credit cost, reAPI is the CometAPI alternative built for that. Run a real workload through two of them and let coverage and invoices decide.

Further reading

• reapi.ai/models — frontier LLMs plus image, video, and audio.
• Claude Opus 4.8 — frontier reasoning on the OpenAI-compatible gateway.
• Best Together AI alternatives — the same comparison for Together AI.

References

1. CometAPI. Pricing and platform overview — 500+ models, below-official rates. Retrieved May 2026 from cometapi.com/pricing
2. OpenRouter. Models — provider and modality catalog. Retrieved May 2026 from openrouter.ai/models
3. OpenRouter. Docs FAQ — pass-through pricing, fees, and free models. Retrieved May 2026 from openrouter.ai/docs/faq
4. WaveSpeed AI. Pricing — pay-per-use rates and trial credits. Retrieved May 2026 from wavespeed.ai/pricing
5. WaveSpeed AI. Platform overview, performance, and API. Retrieved May 2026 from wavespeed.ai/about
6. Together AI. Pricing — serverless tokens, dedicated GPUs, and minimums. Retrieved May 2026 from together.ai/pricing
7. Together AI. OpenAI compatibility and model catalog. Retrieved May 2026 from docs.together.ai/docs/inference/openai-compatibility
8. Replicate. Pricing — hardware and per-output model rates. Retrieved May 2026 from replicate.com/pricing