DeepSeek: DeepSeek V3.1

Pricing, context window and lifecycle for deepseek/deepseek-chat-v3.1, tracked from what the vendor publishes.

Price per million tokens

Input	$0.550
Output	$1.65
Cache price (read)	$0.550
Max price	$1.65

Facts

Model ID	deepseek/deepseek-chat-v3.1
Vendor	DeepSeek
Token limit (context window)	163,840 tokens
Knowledge cutoff	2025-03-31
End of life	none published

Supported parameters

frequency_penalty, include_reasoning, logit_bias, logprobs, max_tokens, min_p, presence_penalty, reasoning, repetition_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_logprobs, top_p

Other DeepSeek models

deepseek/deepseek-chat $0.320 in / $0.890 out
deepseek/deepseek-chat-v3-0324 $0.250 in / $1.00 out
deepseek/deepseek-r1 $0.700 in / $2.50 out
deepseek/deepseek-r1-0528 $0.500 in / $2.15 out
deepseek/deepseek-r1-distill-llama-70b $0.800 in / $0.800 out
deepseek/deepseek-v3.1-terminus $0.270 in / $1.00 out
deepseek/deepseek-v3.2 $0.269 in / $0.400 out
deepseek/deepseek-v3.2-exp $0.270 in / $0.410 out
deepseek/deepseek-v4-flash $0.089 in / $0.177 out
deepseek/deepseek-v4-flash-0731 $0.140 in / $0.280 out

Change history

Every change we have observed since tracking began.

Detected	Change	Detail
2026-09-03 19:14	Pricing Change	Output $0.950 -> $1.65 (+73.7%) · Cache price (read) $0.130 -> $0.550 (+323.1%) · Input $0.250 -> $0.550 (+120.0%)
2026-09-02 19:14	Pricing Change	Output $1.65 -> $0.950 (-42.4%) · Cache price (read) $0.550 -> $0.130 (-76.4%) · Input $0.550 -> $0.250 (-54.5%)

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