Head-to-head comparison
DeepSeek V3.1 Terminus (DeepSeek) and Qwen3 Coder Next (Qwen) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.
Snapshot as of 15 September 2026
As of 15 September 2026, Qwen3 Coder Next holds the stronger ModelCap Index position (#60 vs #63); Qwen3 Coder Next is 1.3× cheaper per output token ($0.80/1M vs $1.00/1M); and Qwen3 Coder Next offers the longer context window (262K vs 164K tokens).
Evidence: 2 public benchmark observations across 2 boards · 3 reported rows against measured corpus ladders (60%); publisher-corpus-prior over 176 held-out anchors (40%); shrunk 5.4 toward the measured corpus. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.
Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.
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Qwen3 Coder Next ranks higher on the ModelCap Index as of 15 September 2026: #60 against #63. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.
Qwen3 Coder Next is cheaper on output tokens: $0.80/1M against $1.00/1M. Input tokens are $0.27/1M for DeepSeek V3.1 Terminus and $0.12/1M for Qwen3 Coder Next. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $1.04 for DeepSeek V3.1 Terminus versus $0.64 for Qwen3 Coder Next. Qwen3 Coder Next costs 38.5% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.
Qwen3 Coder Next has the larger context window: 262K tokens against 164K.
AA Terminal-Bench 2.1: DeepSeek V3.1 Terminus 44.9%, Qwen3 Coder Next 38.2% — DeepSeek V3.1 Terminus leads.
DeepSeek V3.1 Terminus: Open weights. Qwen3 Coder Next: Open weights. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.
ModelCap currently lists 4 API providers for DeepSeek V3.1 Terminus and 4 for Qwen3 Coder Next, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.
Every figure comes from the sealed ModelCap dataset published 15 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.