Source: https://ailoot.ai/models/en/qwen2-5-coder-1-5b-instruct/ Canonical: https://ailoot.ai/models/en/qwen2-5-coder-1-5b-instruct/ Language: en # Qwen2.5-Coder-1.5B [Markdown](https://ailoot.ai/models/en/qwen2-5-coder-1-5b-instruct/index.md) · [JSON](https://ailoot.ai/models/en/qwen2-5-coder-1-5b-instruct/facts.json) ## [Qwen2.5-Coder-1.5B](https://ailoot.ai/models/en/qwen2-5-coder-1-5b-instruct/) Qwen2.5-Coder-1.5B-Instruct is Alibaba’s instruction-tuned coding model for generating, explaining and fixing code; the maker checkpoint contains 1.54B parameters. - [**Ailoot Ultra · OpenAI Chat** `POST /v1/chat/completions` `qwen2.5-coder-1.5b-instruct`](https://ailoot.ai/models/en/qwen2-5-coder-1-5b-instruct/#method-0) - [**Ailoot Ultra · Anthropic Messages** `POST /v1/messages` `qwen2.5-coder-1.5b-instruct`](https://ailoot.ai/models/en/qwen2-5-coder-1-5b-instruct/#method-1) About the model This description covers the model’s capabilities. Available in Ailoot inputs, outputs and options are listed for the selected method below. Qwen2.5-Coder-1.5B-Instruct is a code-focused instruction model from Alibaba. Its maker checkpoint contains 1.54 billion parameters. It belongs to the Qwen2.5-Coder series, whose documented tasks include code generation, code reasoning and code fixing. #### Prepare source and expected behavior For a bug, provide the relevant function, observed error and the result you expected. Include the interface contracts and runtime details that affect the fix. For new code, supply the input shape, output shape and examples of acceptable behavior. #### Keep the change easy to review Request a specific artifact such as a replacement function, a small patch or a test case. Ask an explanation to connect a code path to the observed behavior. Keep unrelated cleanup outside the requested change so its effect is clear. #### Verify against the actual program Run the proposed code with representative inputs and the boundary cases implied by the task. Check compatibility with surrounding callers and dependencies. Keep this exact instruct edition with the result when comparing model sizes or prompt strategies. **Ailoot Ultra · OpenAI Chat** `POST /v1/chat/completions` `qwen2.5-coder-1.5b-instruct` [`qwen2.5-coder-1.5b-instruct`](https://ailoot.ai/models/en/#m=qwen2.5-coder-1.5b-instruct&route=Ultra&caller=qwen2.5-coder-1.5b-instruct&fmt=chat) Other /`qwen2.5-coder-1.5b-instruct` ### Overview Qwen2.5-Coder-1.5B-Instruct is Alibaba’s instruction-tuned coding model for generating, explaining and fixing code; the maker checkpoint contains 1.54B parameters. Accepted inputs Text · Images Results Text ### Available in Ailoot · inputs & methods **Ailoot Ultra · OpenAI Chat** `POST /v1/chat/completions` Input types `text`, `image` Output types `text` Output format JSON or SSE | Field | Type | Requirement | Values & limits | Default | | --- | --- | --- | --- | --- | | Field`model` | Type`string` | RequirementRequired | Values & limits qwen2.5-coder-1.5b-instruct Conditions: Use this exact Ailoot routing selector. | Default— | | Field`messages` | Type`array` | RequirementRequired | Values & limits Conditions: | Default— | | Field`stream` | Type`boolean` | RequirementOptional | Values & limits Conditions: | Defaultfalse | Input material combinations **text\_input** · Required: messages **image\_with\_text** · Required: messages with actual image content blocks Method parameters and lifecycle | Parameter | Contract | | --- | --- | | Parameter`content_type` | Contractapplication/json | | Parameter`required` | Contractmodel, messages | | Parameter`optional` | Contractstream | | Parameter`material_types` | Contracttext, image | | Parameter`conditions` | ContractUse this exact Ailoot routing selector., Image content is carried by this protocol where the exact selected model supports vision. Protocol admission does not establish image capability for every model. | Method aliases: `/chat/completions` Lifecycle: `synchronous_or_streamed` ### Pricing Tariff references do not add request options. Supported parameters are listed for the selected method. Fast mode Standard rate When fast mode is selected Flex mode Standard rate When flex mode is selected Maximum reasoning effort Standard rate When maximum reasoning effort uses the default adjustment Explicit cache pricing Not enabled When explicit cache is requested Text-only zero rates Cache, tools and media follow their separately listed pricing conditions. For text-only input and output #### Ailoot rates #### Prices by configuration | Configuration | Rate schedule | Charge | | --- | --- | --- | | ConfigurationBase token rates | Rate scheduleBase rate | Charge Input · Input tokens **$0** / 1K tokens Output · Output tokens **$0** / 1K tokens Input · Cache read **$0** / 1K tokens Input · Cache write **$0** / 1K tokens Input · Cache write, 1 hour **—** / 1K tokens | Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/) ### Example requests #### Ailoot Ultra · OpenAI Chat curl · create once and retain the complete result ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" export AILOOT_API_KEY python3 - <<'PY_REQUEST' import json,os from pathlib import Path p=json.loads('{"model": "qwen2.5-coder-1.5b-instruct", "messages": [{"role": "user", "content": "Explain how a rainbow forms."}]}') Path("request.json").write_text(json.dumps(p,ensure_ascii=False)) PY_REQUEST curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/chat/completions \ -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \ --data-binary @request.json -D response-headers.txt -o result.json # Submit once. Retain the complete result, original identifiers and every response header. ``` ### Receive and save results #### Ailoot Ultra · OpenAI Chat JSON or SSE ##### Keep all completed results Keep every complete returned response, file and content part. Retain every content block, tool-call ID, thinking signature when returned, all SSE deltas and complete usage. A first text fragment is not the whole result. ##### If the original response needs checking Keep the original X-Client-Request-ID, response and headers. An unknown or result\_pending\_check outcome does not authorize a second creation. Response fields | Field | Type | | --- | --- | | Field`choices[]` | Typeobject | | Field`usage` | Typeobject | Errors and next steps | Response | Condition | Next step | | --- | --- | --- | | Response400 · `invalid_request_error` | ConditionA required field, model selector, type or input representation is invalid. | Next stepInspect the returned validation detail before preparing a separate request. | | Response`` | ConditionThe original request or result is unknown or requires a check. | Next stepKeep original identifiers and headers; read only supported status/library records. Do not submit creation again. | ### Aliases #### Model aliases **Ailoot Ultra** [`qwen2.5-coder-1.5b-instruct`](https://ailoot.ai/models/en/#m=qwen2.5-coder-1.5b-instruct&route=Ultra&caller=qwen2.5-coder-1.5b-instruct&fmt=chat) #### Method path aliases `/chat/completions` #### Related caller IDs [`qwen2.5-coder-1.5b-instruct`](https://ailoot.ai/models/en/#m=qwen2.5-coder-1.5b-instruct&route=Ultra&caller=qwen2.5-coder-1.5b-instruct&fmt=chat) **Ailoot Ultra · Anthropic Messages** `POST /v1/messages` `qwen2.5-coder-1.5b-instruct` [`qwen2.5-coder-1.5b-instruct`](https://ailoot.ai/models/en/#m=qwen2.5-coder-1.5b-instruct&route=Ultra&caller=qwen2.5-coder-1.5b-instruct&fmt=messages) Other /`qwen2.5-coder-1.5b-instruct` ### Overview Qwen2.5-Coder-1.5B-Instruct is Alibaba’s instruction-tuned coding model for generating, explaining and fixing code; the maker checkpoint contains 1.54B parameters. Accepted inputs Text · Images Results json · sse ### Available in Ailoot · inputs & methods **Ailoot Ultra · Anthropic Messages** `POST /v1/messages` Input types `text`, `image` Output types `json`, `sse` Output format JSON or SSE | Field | Type | Requirement | Values & limits | Default | | --- | --- | --- | --- | --- | | Field`model` | Type`string` | RequirementRequired | Values & limits qwen2.5-coder-1.5b-instruct Conditions: Use this exact Ailoot routing selector. | Default— | | Field`messages` | Type`array` | RequirementRequired | Values & limits Conditions: | Default— | | Field`stream` | Type`boolean` | RequirementOptional | Values & limits Conditions: | Defaultfalse | | Field`max_tokens` | Type`integer` | RequirementRequired | Values & limits Minimum: 1 Conditions: | Default— | Input material combinations **text\_input** · Required: messages **image\_with\_text** · Required: messages with actual image content blocks Method parameters and lifecycle | Parameter | Contract | | --- | --- | | Parameter`content_type` | Contractapplication/json | | Parameter`required` | Contractmodel, messages, max\_tokens | | Parameter`optional` | Contractstream | | Parameter`material_types` | Contracttext, image | | Parameter`conditions` | ContractUse this exact Ailoot routing selector., Image content is carried by this protocol where the exact selected model supports vision. Protocol admission does not establish image capability for every model. | Lifecycle: `synchronous_or_streamed` ### Pricing Tariff references do not add request options. Supported parameters are listed for the selected method. Fast mode Standard rate When fast mode is selected Flex mode Standard rate When flex mode is selected Maximum reasoning effort Standard rate When maximum reasoning effort uses the default adjustment Explicit cache pricing Not enabled When explicit cache is requested Text-only zero rates Cache, tools and media follow their separately listed pricing conditions. For text-only input and output #### Ailoot rates #### Prices by configuration | Configuration | Rate schedule | Charge | | --- | --- | --- | | ConfigurationBase token rates | Rate scheduleBase rate | Charge Input · Input tokens **$0** / 1K tokens Output · Output tokens **$0** / 1K tokens Input · Cache read **$0** / 1K tokens Input · Cache write **$0** / 1K tokens Input · Cache write, 1 hour **—** / 1K tokens | Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/) ### Example requests #### Ailoot Ultra · Anthropic Messages curl · create once and retain the complete result ```bash set -eu : "${AILOOT_API_KEY:?Set your Ailoot API key}" export AILOOT_API_KEY python3 - <<'PY_REQUEST' import json,os from pathlib import Path p=json.loads('{"model": "qwen2.5-coder-1.5b-instruct", "messages": [{"role": "user", "content": "Explain how a rainbow forms."}], "max_tokens": 256}') Path("request.json").write_text(json.dumps(p,ensure_ascii=False)) PY_REQUEST curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/messages \ -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \ --data-binary @request.json -D response-headers.txt -o result.json # Submit once. Retain the complete result, original identifiers and every response header. ``` ### Receive and save results #### Ailoot Ultra · Anthropic Messages JSON or SSE ##### Keep all completed results Keep every complete returned response, file and content part. Retain every content block, tool-call ID, thinking signature when returned, all SSE deltas and complete usage. A first text fragment is not the whole result. ##### If the original response needs checking Keep the original X-Client-Request-ID, response and headers. An unknown or result\_pending\_check outcome does not authorize a second creation. Response fields | Field | Type | | --- | --- | | Field`content[]` | Typeobject | | Field`usage` | Typeobject | Errors and next steps | Response | Condition | Next step | | --- | --- | --- | | Response400 · `invalid_request_error` | ConditionA required field, model selector, type or input representation is invalid. | Next stepInspect the returned validation detail before preparing a separate request. | | Response`` | ConditionThe original request or result is unknown or requires a check. | Next stepKeep original identifiers and headers; read only supported status/library records. Do not submit creation again. | ### Aliases #### Model aliases **Ailoot Ultra** [`qwen2.5-coder-1.5b-instruct`](https://ailoot.ai/models/en/#m=qwen2.5-coder-1.5b-instruct&route=Ultra&caller=qwen2.5-coder-1.5b-instruct&fmt=messages) #### Method path aliases `/chat/completions` #### Related caller IDs [`qwen2.5-coder-1.5b-instruct`](https://ailoot.ai/models/en/#m=qwen2.5-coder-1.5b-instruct&route=Ultra&caller=qwen2.5-coder-1.5b-instruct&fmt=messages) FAQ · Qwen2.5-Coder-1.5B What inputs and results are available? `POST /v1/chat/completions` · `qwen2.5-coder-1.5b-instruct`: `text`, `image` → `text` `POST /v1/messages` · `qwen2.5-coder-1.5b-instruct`: `text`, `image` → `json`, `sse` Which fields does the request use? `POST /v1/chat/completions` · `qwen2.5-coder-1.5b-instruct`: `model`, `messages`, `stream` `POST /v1/messages` · `qwen2.5-coder-1.5b-instruct`: `model`, `messages`, `stream`, `max_tokens` What limits apply? `POST /v1/messages` · `qwen2.5-coder-1.5b-instruct`: `max_tokens.minimum`: `1` Connect Ailoot to Claude Code, OpenCode, Hermes or your own app. ## The company and its project portfolio The company and its project portfolio: millions of customers; monthly sales in the billions. ## Buy tokens at a discount. Subscription discounts for regular use. Promo codes offer up to 50% off token purchases. Subscription Choose a discounted plan for your regular requests. Promo code: up to 50% off Enter your code at checkout. The price updates to reflect the current promotion. Spending in your history The model, tokens and amount are recorded for each request. [Choose a subscription](https://ailoot.ai/docs/en/billing/subscriptions/) · [View model prices](https://ailoot.ai/models/en/) ## Connect the API to a product you sell. Use Ailoot in SaaS, apps and bots under its official service offer and licence agreement. Request a reseller licence for resale. Commercial application Add text, image, video and audio generation to paid features in your service. Reseller licence Send a description of your project and how you provide access. Request written terms for use and resale. Documents on the website The service offer, licence agreement and data processing policy are available before you connect. [Request a reseller licence](mailto:support@ailoot.ai) · [Service offer and licence agreement](https://ailoot.ai/legal/offer?lang=en) ## Ailoot · The company and its project portfolio Ailoot combines established operating experience, a large client base, stable service and ongoing KPI control. The company and its project portfolio: millions of customers; monthly sales in the billions. Ailoot brings that operating experience to API access for AI features in customer products, agents, applications and automations.