Roundup
Best AI Models for Coding
Which frontier models actually hold up in multi-file refactors, agentic tooling and test-driven work, and what they cost per million tokens.
DeepSeek: DeepSeek V3.1 Terminus
deepseek/deepseek-v3.1-terminus
DeepSeek-V3.1 Terminus is an update to [DeepSeek V3.1](/deepseek/deepseek-chat-v3.1) that maintains the model's original capabilities while addressing issues reported by users, including language consistency and agent capabilities, further optimizing the model's...
Listed (22 Sept 2025)
Source: OpenRouter (live)
- Input
- $0.270
- USD per 1M tokens
- Output
- $1.00
- USD per 1M tokens
- Blended
- $0.453
- 75% in / 25% out
- Context
- 164K
- tokens
- Max output
- 147K
- tokens
- Modality
- text->text
Prices as listed on OpenRouter, refreshed every five minutes. Provider-direct prices may differ. Convert to your currency on the AI Tracker.
Price history
How this listing has moved
- 7-day
- 0.0%
- $0.453 → $0.453/M
- 30-day
- 0.0%
- $0.453 → $0.453/M
- 90-day
- 0.0%
- $0.453 → $0.453/M
32 daily snapshots from 24 Sept 2026 to 3 Nov 2026. Blended = 75% input / 25% output. See all changes on Market Movers.
Capabilities
Declared on the listing
- Tool / function calling Declared
- Reasoning controls Declared
- Structured output Declared
- InputText
- OutputText
Capabilities are read from the provider listing. "Not declared" means the listing does not advertise the feature, not that it is absent.
Why it costs this
Pricing context
- 50% below median
- Market median blended price is $0.900/M across 429 priced models.
Alternatives
More from DeepSeek
$0.525
/M blended
$0.075
/M blended
DeepSeek
$0.159
/M blended
$0.323
/M blended
DeepSeek: DeepSeek V4 Pro 0813
DeepSeek
$1.09
/M blended
DeepSeek: DeepSeek V4 Flash 0731
DeepSeek
$0.119
/M blended
Alternatives
Similar price, other providers
OpenAI
$0.450
/M blended
OpenAI
$0.450
/M blended
Z.ai (Zhipu)
$0.450
/M blended
Mistral
$0.450
/M blended
MiniMax
$0.446
/M blended
OpenAI
$0.463
/M blended
Within ±50% of $0.453/M blended.
Analysis
Related reading
Review
DeepSeek Review
Open-weight, remarkably cheap and genuinely capable. Where DeepSeek fits and what to watch for.
Low-cost open-weight reasoning and chat models. All DeepSeek models · Official site
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