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Morph vs Relace
The closest head-to-head in coding-agent tooling. Both sell fast apply models and repo search; Morph edges on speed and breadth, Relace on self-hosting and compaction speed.
By The Subconscious Team · Updated
Morph vs Relace: key differences
These two really are substitutes. Both sell small models that merge a frontier model's partial edit into a full file, and both have grown into toolkits for coding agents. Morph's Fast Apply runs at 10,500+ tokens per second with up to 98% accuracy on a 7B model trained only on code merging. Relace's relace-apply-3 runs at about 10,000 tokens per second with 128K tokens of input and output. Morph says its approach cuts token usage about 40% against full rewrites. Relace says its apply is over 3x faster and cheaper than having the big model rewrite the file.
The toolkits differ at the edges. Morph adds WarpGrep for agentic repo search, Compact for context compression, Reflex for classification, fine-tuning and general chat endpoints. Relace adds parallel agentic search, a compaction model at 50,000 tokens per second, and source control with retrieval built in. Deployment is the clearest split: Relace offers self-hosting with guided onboarding for enterprises that keep code in-house, while Morph is an OpenAI compatible hosted API. Relace errors past 128K tokens. Morph's 2 to 4% merge error rate calls for tests or linting.
What Morph and Relace do
Morph
Morph builds small, very fast specialist models that sit beside a big coding model inside an agent. Its flagship is Fast Apply. The frontier model writes only the changed lines with // ... existing code ... markers, and Morph merges them into the full file at 10,500+ tokens per second with up to 98% accuracy. It is the same idea behind Cursor's instant apply, offered as an OpenAI compatible API.
Example models: morph-v3-fast, morph-v3-large
Full Morph profileRelace
Relace started out training small, fast models that act as tools for coding agents, and by October 2026 its homepage led with open-model inference instead. It says it served 30 trillion tokens in the 30 days to late October and ranks among the top providers on OpenRouter. The hosted catalog covers DeepSeek V4 Pro, V4 Flash and V4.1 Flash, Kimi K3, GLM 5.3, GLM 5.3 Flash and GLM 5.2 over OpenAI and Anthropic compatible APIs, billed per token with no subscription. Prices run from $0.07 in and $0.14 out per million tokens on DeepSeek V4 Flash to $2.00 in and $14.00 out on Kimi K3, and Relace says it reprices often.
Example models: DeepSeek V4.1 Flash, Kimi K3, GLM 5.3, relace-apply-3
Full Relace profileShould you choose Morph or Relace?
Morph
Choose Morph for
- The fastest published apply speed, at 10,500+ tokens per second
- One vendor for apply, search, classification and fine-tuning
- CI and sandbox pipelines editing code at volume
Relace
Choose Relace for
- Self-hosted apply and search for in-house code
- Very fast context compaction at 50,000 tokens per second
- App builders that need source control with retrieval
Morph vs Relace at a glance
| Attribute | Morph | Relace |
|---|---|---|
| Model access | Specialist models | Open weights, plus specialist coding models |
| Flagship models | morph-v3-fast, morph-v3-large | DeepSeek V4.1 Flash, Kimi K3, GLM 5.3, relace-apply-3 |
| Speed | 10,500+ tok/s Fast Apply | ~10,000 tok/s apply |
| Price | $0.80 in, $1.20 out (morph-v3-fast) | $0.07 in, $0.50 out (DeepSeek V4.1 Flash) |
| Customization | Fine-tuning offered | Unknown |
| Deployment | OpenAI compatible API; self-hosted on Enterprise | Hosted API, OpenRouter or self-hosted |
| Long context | Unknown | 128K on apply; varies by open model |
Frequently asked questions
What is the difference between Morph and Relace?
The closest head-to-head in coding-agent tooling. Both sell fast apply models and repo search; Morph edges on speed and breadth, Relace on self-hosting and compaction speed.
When should I choose Morph over Relace?
The fastest published apply speed, at 10,500+ tokens per second; One vendor for apply, search, classification and fine-tuning; CI and sandbox pipelines editing code at volume.
When should I choose Relace over Morph?
Self-hosted apply and search for in-house code; Very fast context compaction at 50,000 tokens per second; App builders that need source control with retrieval.
Is Morph or Relace cheaper?
Morph: $0.80 in, $1.20 out (morph-v3-fast). Relace: $0.07 in, $0.50 out (DeepSeek V4.1 Flash). The cheaper choice depends on the model and workload.
Related comparisons
Running long-horizon agents?
If your agents run past 200K tokens, compare both against Subconscious. Our inference stack treats a long-horizon trace as the primary workload, so speed, cost, and accuracy hold up deep into the trace.