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Anthropic: Claude Haiku 5.5
anthropic/claude-haiku-5.5textVisionReasoning
Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and knowledge work, and accepts text and image input with a 1M-token context window.
It is the first Haiku model with adjustable effort. Thinking is adaptive and on by default, with effort as the main lever for trading off depth, latency, and cost; it can be turned off at low, medium, and high effort.
Price in / out
Cache, read / write
Context / Max output
1M / 128K
Released
Oct 7, 2026
Additional rates
Above 100K prompt tokens the upstream charges 5× more — per-route rates are in the table below.
Parameters
messagesrequiredreasoning_effortoff · low · medium · high · xhigh · maxmax_tokensoptional · alias max_completion_tokensstreamtrue · falsetoolsfunction calling (OpenAI format)tool_choiceauto · none · requiredresponse_formatjson_object · json_schemaweb_search · · · providerrouting: order · only · ignore · sortstream_options{"include_usage": true}image_urlimage (data: URL)Fine-tuning · 1
stopoptionalHow to use via API
from openai import OpenAI
client = OpenAI(base_url="https://api.mixen.ai/v1", api_key="mxn-...")
resp = client.chat.completions.create(
model="anthropic/claude-haiku-5.5",
messages=[{"role": "user", "content": "Привет"}],
reasoning_effort="low", # off · low · medium · high · xhigh · max
max_tokens=1024,
stream=False,
)
print(resp.choices[0].message.content)
# Стриминг: stream=True — ответ приходит чанками
for chunk in client.chat.completions.create(
model="anthropic/claude-haiku-5.5",
messages=[{"role": "user", "content": "Привет"}],
stream=True,
):
print(chunk.choices[0].delta.content or "", end="", flush=True)
