StarSeaAPI

Reasoning models

reasoning LLM API, chain of thought model

Reasoning models spend extra tokens before answering. That is a real cost and a real latency, so they earn their keep only when the task has a verifiable answer — maths, code, multi-step extraction, debugging. For plain summarisation or rewriting they are usually the wrong tool: a cheaper chat model reaches the same output at a fraction of the price. Note that thinking tokens are billed as output tokens, so the effective price of a reasoning call is often several times the headline output rate.

Models (56)

Models	Providers	Input $/M	Output $/M	Intelligence index	Coding index
claude-opus-4-6	Anthropic	$5.00	$25.00	—	—
claude-opus-4-7	Anthropic	$5.00	$25.00	—	—
claude-opus-4-8	Anthropic	$5.00	$25.00	—	—
claude-opus-5	Anthropic	$5.00	$25.00	54.1	78.0
claude-sonnet-4-6	Anthropic	$3.00	$15.00	—	—
claude-sonnet-5	Anthropic	$2.00	$10.00	45.1	71.5
codex-auto-review	OpenAI	$2.50	$15.00	—	—
deepseek-v4-flash	DeepSeek	$0.15	$0.61	40.8	69.1
deepseek-v4-flash-0731	DeepSeek	$0.15	$0.61	—	—
deepseek-v4-pro	DeepSeek	$0.68	$2.05	42.1	68.8
deepseek-v4-pro-0813	DeepSeek	$0.68	$2.05	—	—
deepseek-v4.1-flash	DeepSeek	$0.15	$0.61	—	—
doubao-seed-2.0-lite	ByteDance Doubao	$0.09	$0.55	—	—
doubao-seed-2.0-mini	ByteDance Doubao	$0.030	$0.30	—	—
doubao-seed-2.1-turbo	ByteDance Doubao	$0.45	$2.27	—	—
doubao-seed-evolving	ByteDance Doubao	$0.91	$4.55	—	—
gemini-3.1-pro-preview	Google	$2.00	$12.00	36.7	68.8
gemini-3.1-pro-preview-thinking-128	Google	$2.00	$12.00	—	—
gemini-3.6-flash	Google	$1.50	$7.50	40.3	69.2
glm-4.5	Zhipu AI	$0.61	$2.42	—	—
glm-4.5-air	Zhipu AI	$0.12	$0.30	—	—
glm-4.6	Zhipu AI	$0.61	$2.42	—	45.8
glm-4.7	Zhipu AI	$0.30	$1.21	—	45.3
glm-5	Zhipu AI	$0.61	$2.73	—	—
glm-5-turbo	Zhipu AI	$0.76	$3.33	—	—
glm-5.1	Zhipu AI	$0.91	$3.64	—	55.8
glm-5.2	Zhipu AI	$1.21	$4.24	—	68.8
glm-5.3	Zhipu AI	$1.21	$4.24	48.6	74.8
gpt-5.3-codex-spark	OpenAI	$1.75	$14.00	—	—
gpt-5.4	OpenAI	$2.50	$15.00	—	71.1
gpt-5.5	OpenAI	$5.00	$30.00	—	74.9
gpt-5.6	OpenAI	$5.00	$30.00	—	—
gpt-5.6-sol	OpenAI	$5.00	$30.00	51.3	77.4
gpt-5.6-terra	OpenAI	$2.00	$12.00	46.8	76.7
gpt-6-astra	OpenAI	$10.00	$50.00	54.7	76.9
grok-4.5	xAI	$2.00	$6.00	45.5	72.4
grok-4.6	xAI	$2.00	$6.00	50.6	76.8
hy3	Tencent Hunyuan	$0.15	$0.61	—	—
k3	Moonshot AI	$3.03	$15.15	—	—
kimi-k2.7-code	Moonshot AI	$0.98	$4.09	—	60.8
kimi-k3	Moonshot AI	$3.03	$15.15	50.2	76.2
mimo-v2.5	Xiaomi MiMo	$0.15	$0.30	—	56.8
mimo-v2.5-pro	Xiaomi MiMo	$0.45	$0.91	32.6	60.2
MiniMax-M2	MiniMax	$0.32	$1.27	—	—
MiniMax-M2.1	MiniMax	$0.32	$1.27	—	—
MiniMax-M2.1-highspeed	MiniMax	$0.64	$2.55	—	—
MiniMax-M2.5	MiniMax	$0.32	$1.27	—	—
MiniMax-M2.5-highspeed	MiniMax	$0.64	$2.55	—	—
MiniMax-M2.7	MiniMax	$0.32	$1.27	—	52.6
MiniMax-M2.7-highspeed	MiniMax	$0.64	$2.55	—	—
minimax-m3	MiniMax	$0.64	$2.55	35.7	58.6
qwen3.6-flash	Alibaba Qwen	$0.18	$1.09	—	—
qwen3.7-max	Alibaba Qwen	$1.82	$5.45	—	66.0
qwen3.7-plus	Alibaba Qwen	$0.30	$1.21	—	55.9
qwen3.8-flash	Alibaba Qwen	$0.12	$0.41	—	—
qwen3.8-max	Alibaba Qwen	$1.82	$5.45	53.4	68.9

Prices are per 1M tokens in USD · ¥6.6 = $1

Capabilities