Data as of October 17, 2026 · How the score is built
Mercury 2.5 Preview
Decision readingMercury 2.5 Preview is tracked, but not publicly ranked yet. The profile exposes 0 sourced benchmark rows and leaves unsupported fields blank until a published record exists.
Released Aug 31, 2026 — see all recent releases
Lineage
The sequence follows explicit supersedes links. Each score is estimated for that model; a relative can inform a sparse estimate but never sets a floor, so a newer release can score below an earlier one. Scores and prices remain blank when the corresponding public row or first-party rate is unavailable.
preview · Preview
Mercury 2.5 · 33.8Spec sheet
Each documented value carries its source. Missing fields stay visible as not sourced or not published, rather than disappearing from the page.
- API model ID
- inception/mercury-2.5-previewInception model and pricing documentation
- Context window
- 260KInception model and pricing documentation
- Maximum output
- Not sourced yet
- Knowledge cutoff
- Not sourced yet
- Input modalities
- Not sourced yet
- Output modalities
- Not sourced yet
- Parameters
- Not disclosed by the provider
- Availability
- Available through OpenRouter as `inception/mercury-2.5-preview` with text input and output, optional reasoning levels, parallel tool calling, structured JSON output, a 260,000-token context window, and up to 65,536 completion tokens.
- Cloud regions
- Not tracked yet
- Lifecycle
- Current
- API capabilities
- Tool calling, structured outputs, and batch support are not tracked yet
- Prompt caching
- Not documented in the pricing recordInception model and pricing documentation
- Self-host
- Weights are not published
- Rate limits
- Not tracked yet
How to read this profile
The visual layer above carries the decisions. These notes preserve the model, ranking, coverage, and family context behind the numbers.
We track Mercury 2.5 Preview, but no weighted text-model benchmark result is published on the site yet. This page shows the metadata and separate protocol evidence we can verify now; a BenchLM score will appear only if compatible public evaluations land.
Mercury 2.5 Preview is a proprietary model with a 260K context window. It uses an explicit reasoning mode, which can improve complex problem solving while adding latency and token use.
Available through OpenRouter as `inception/mercury-2.5-preview` with text input and output, optional reasoning levels, parallel tool calling, structured JSON output, a 260,000-token context window, and up to 65,536 completion tokens.
Mercury 2.5 Preview was listed on OpenRouter on August 31, 2026. Inception released Mercury 2.5 on September 8 with a separate first-party API ID. This preview record retains its own identity; Mercury 2 and production Mercury 2.5 benchmark results are not inherited.
Mercury 2.5 Preview sits in the Mercury 2.5 family with Mercury 2.5. Its explicit predecessor is Mercury 2. The profile has no source-displayable benchmark row yet.
Last updated October 17, 2026. Runtime fields remain blank until a sourced snapshot exists.
Questions
How does Mercury 2.5 Preview perform overall in AI benchmarks?
Mercury 2.5 Preview does not have any source-displayable benchmark rows yet, so this profile does not assign a public score or rank. Documented specifications remain visible, while score-led charts and claims stay unavailable until a published evaluation can be attached to the exact model.
Which sibling models are related to Mercury 2.5 Preview?
Mercury 2.5 Preview belongs to the Mercury 2.5 family. Related tracked variants include Mercury 2.5. A sibling link indicates shared lineage or a documented configuration relationship; it does not mean the variants have identical pricing, context limits, benchmark evidence, or deployment behavior. Compare before switching.
Does Mercury 2.5 Preview have full benchmark coverage on BenchLM?
No. Mercury 2.5 Preview currently has 0 source-displayable rows across 681 tracked benchmark slots. The profile exposes published, non-generated evidence and leaves missing categories blank until an exact evaluation is available. Coverage describes how much was measured; it is not a penalty added to an individual benchmark result.
What is the context window size of Mercury 2.5 Preview?
Mercury 2.5 Preview has a documented context window of 260K. That figure is the maximum combined prompt and retained-conversation space reported for this exact model; it is not the maximum output length. The profile keeps output limits separate because providers often publish those limits independently.