Is ERNIE-5.5-Flash-Preview (free) free?

Yes. The pricing shown on this page for ERNIE-5.5-Flash-Preview (free) is zero, so you are not charged for prompt or completion tokens. Free endpoints are rate limited — see the rate limit docs.

What is the context length of ERNIE-5.5-Flash-Preview (free)?

ERNIE-5.5-Flash-Preview (free) has a 1,024,000 token context window. It supports up to 1,024,000 completion tokens.

Does ERNIE-5.5-Flash-Preview (free) support tool calling and structured outputs?

Yes. ERNIE-5.5-Flash-Preview (free) accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

Which providers serve ERNIE-5.5-Flash-Preview (free)?

ERNIE-5.5-Flash-Preview (free) is served by 1 provider on OpenRouter: Baidu Qianfan.

What other text models does Baidu have?

ERNIE-Light-DT-1.0 is another text model from Baidu.

When was ERNIE-5.5-Flash-Preview (free) released?

ERNIE-5.5-Flash-Preview (free) was released on November 10, 2026.

Baidu: ERNIE-5.5-Flash-Preview (free)

baidu/ernie-5.5-flash-preview:free

Model weights

Compare

ERNIE 5.5 Flash Preview is the latest foundation model in the ERNIE family, with comprehensive improvements in coding, agentic capabilities, knowledge work, and deep research. It has 280 billion total parameters, activates 14 billion parameters per token, and supports a context window of 1 million tokens. Its new architecture combines strong model capabilities with efficient inference, delivering generation speeds of more than 200 tokens per second.

Modalities

Price

Free

Context

1.0M

Released

Nov 10, 2026

Providers

This model is hosted by one provider. OpenRouter forwards every request without routing.

Latency / throughput


	Free	Free	2.74s	73 tok/s	100.00%

Input FreeOutput Free
73 tok/s100.00% uptime

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Uptime (3d)

100.00%

Availability (3d)

99.91%

Availability over the last 3 days

Last 72 hours

Availability 99.91%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

99.94%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Kilo Code

Kilo Code is an open-source AI coding agent that works across VS Code, JetBrains, and CLI to help developers ship code faster with agentic workflows.

763Btokens

Hermes Agent

Hermes Agent is an open-source, self-improving AI agent by Nous Research that runs persistently with memory across sessions, and builds reusable skills from experience. It comes with 40+ built-in tools, including web search, browser automation, and vision, plus scheduled automations and subagents.

41Btokens

ZCode

ZCode combines the best AI agents with your existing tools so you can plan, code, review, and deploy without friction.

21.1Btokens

omp

new

18.8Btokens

DeepSeek Harness

new

17.3Btokens

Top 5 Apps

227B

Rest of OpenRouter

95.5B

Not currently available through EU in-region routing. In-region routing docs

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ERNIE 4.5 21B A3B

A sophisticated text-based Mixture-of-Experts (MoE) model featuring 21B total parameters with 3B activated per token, delivering exceptional multimodal understanding and generation through heterogeneous MoE structures and modality-isolated routing. Supporting an extensive 131K token context length, the model achieves efficient inference via multi-expert parallel collaboration and quantization, while advanced post-training techniques including SFT, DPO, and UPO ensure optimized performance across diverse applications with specialized routing and balancing losses for superior task handling.

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ERNIE 4.5 VL 424B A47B

ERNIE-4.5-VL-424B-A47B is a multimodal Mixture-of-Experts (MoE) model from Baidu’s ERNIE 4.5 series, featuring 424B total parameters with 47B active per token. It is trained jointly on text and image data using a heterogeneous MoE architecture and modality-isolated routing to enable high-fidelity cross-modal reasoning, image understanding, and long-context generation (up to 131k tokens). Fine-tuned with techniques like SFT, DPO, UPO, and RLVR, this model supports both “thinking” and non-thinking inference modes. Designed for vision-language tasks in English and Chinese, it is optimized for efficient scaling and can operate under 4-bit/8-bit quantization.

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ERNIE 4.5 300B A47B

ERNIE-4.5-300B-A47B is a 300B parameter Mixture-of-Experts (MoE) language model developed by Baidu as part of the ERNIE 4.5 series. It activates 47B parameters per token and supports text generation in both English and Chinese. Optimized for high-throughput inference and efficient scaling, it uses a heterogeneous MoE structure with advanced routing and quantization strategies, including FP8 and 2-bit formats. This version is fine-tuned for language-only tasks and supports reasoning, tool parameters, and extended context lengths up to 131k tokens. Suitable for general-purpose LLM applications with high reasoning and throughput demands.

Text131K context

Baidu: ERNIE-5.5-Flash-Preview (free)

Providers

Performance

Uptime

Availability over the last 3 days

Availability over the last 24 hours

Apps

Activity

API

Frequently asked questions

Explore more models

More models from baidu

More models from baidu

Baidu: ERNIE-5.5-Flash-Preview (free)

Providers

Performance

Uptime

Availability over the last 3 days

Availability over the last 24 hours

Apps

Activity

API

Frequently asked questions

What is ERNIE-5.5-Flash-Preview (free)?

Is ERNIE-5.5-Flash-Preview (free) free?

What is the context length of ERNIE-5.5-Flash-Preview (free)?

Does ERNIE-5.5-Flash-Preview (free) support tool calling and structured outputs?

Which providers serve ERNIE-5.5-Flash-Preview (free)?

What other text models does Baidu have?

When was ERNIE-5.5-Flash-Preview (free) released?

Explore more models

More models from baidu

More models from baidu