Capability
Unranked
field median 56.3
Not eligible for a public rank
Mercury 2.5 model card
Released Sep 8, 2026 — see all recent releases
Decision reading
Mercury 2.5 is Inception’s September 8, 2026 diffusion reasoning release. It has 260K context and launch rates of $0.04 per million input tokens and $0.15 per million output tokens. Inception reports 79% on GPQA Diamond and 77% on IFBench. These are provider-reported results, with the source linked beside each row.
Data as of September 8, 2026 · How the score is built
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Strongest published evidence
Instruction Following ranks #53. A well-rounded choice across a range of tasks.
Validate before choosing
5 published rows leave some tracked benchmark slots empty. Independent runtime speed has not been measured.
Decision snapshot
Each value carries a field reference instead of floating alone. Markers compare this model with the current ranked and priced catalog; they are not absolute quality thresholds.
Price
$0.040input / $0.15 output
input median $1
cached $0.004 · blended $0.095
Speed
1107tok/s
No field comparison available
Provider-reported · NVIDIA GPUs · TTFT not published
Context
260Ktokens
field median 256,000
Maximum output length is tracked separately
How much of this is verified
Coverage is split by category so a strong number never hides a thin evidence base. Verified means the row is tied to a published source; provisional rows remain visible but separate.
- Agentic2/2 verified
- Coding1/1 verified
- ReasoningNot measured
- Knowledge1/1 verified
- MathNot measured
- MultilingualNot measured
- MultimodalNot measured
- Inst. Following1/1 verified
Verified sourceProvisionalNot measured
Spec 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
- mercury-2.5Inception models and Mercury 2.5 launch pricing
- Context window
- 260KInception models and Mercury 2.5 launch pricing
- 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 the Inception API as `mercury-2.5`, with 260K context, tunable reasoning, parallel tool calls, and schema-aligned JSON. The launch also lists Baseten and OpenRouter access.
- Cloud regions
- Not tracked yet
- Lifecycle
- Current
- API capabilities
- Tool calling, structured outputs, and batch support are not tracked yet
- Prompt caching
- Published at $0.004 per million cached input tokensInception models and Mercury 2.5 launch pricing
- Self-host
- Weights are not published
- Rate limits
- Not tracked yet
Category score record
Scores and ranks appear only where published evidence can be displayed. The table keeps the score, weight, cohort, and evidence state together.
| Category | Score | Rank | Percentile | Weight | Benchmarks | Evidence |
|---|---|---|---|---|---|---|
| AgenticRank #91 of 152Percentile 40thWeight 22%2 benchmarksVerified | 44.5 | #91 of 152 | 40th | 22% | 2 benchmarks | Verified |
| CodingRank #73 of 151Percentile 52ndWeight 20%1 benchmarkVerified | 47.8 | #73 of 151 | 52nd | 20% | 1 benchmark | Verified |
| ReasoningWeight 17%0 benchmarksNot measured | Not measured | Not ranked | Not available | 17% | 0 benchmarks | Not measured |
| KnowledgeRank #94 of 182Percentile 49thWeight 12%1 benchmarkVerified | 48.3 | #94 of 182 | 49th | 12% | 1 benchmark | Verified |
| MathWeight 5%0 benchmarksNot measured | Not measured | Not ranked | Not available | 5% | 0 benchmarks | Not measured |
| MultilingualWeight 7%0 benchmarksNot measured | Not measured | Not ranked | Not available | 7% | 0 benchmarks | Not measured |
| MultimodalWeight 12%0 benchmarksNot measured | Not measured | Not ranked | Not available | 12% | 0 benchmarks | Not measured |
| Inst. FollowingRank #53 of 121Percentile 57thWeight 5%1 benchmarkVerified | 80.1 | #53 of 121 | 57th | 5% | 1 benchmark | Verified |
Benchmark ledger
Coding opens by default. The marker compares each value with the best source-verified result in the catalog; provisional leaders do not set the reference. Expand the remaining categories for every published row.
Coding1 row
| Benchmark | Score | Versus best verified row | Gap | Weight | Evidence |
|---|---|---|---|---|---|
| SciCodeScientific Code Benchmark | Score38% | Versus best verified row Best verified: Sakana Fugu · 60.1% | Gap22.1 behind | WeightWeighted 10% | Provider exact |
Agentic2 rows
| Benchmark | Score | Versus best verified row | Gap | Weight | Evidence |
|---|---|---|---|---|---|
| τ³-bench resultsτ³-Bench Tool-Agent-User Evaluation | Score96.0% | Versus best verified row Best verified: Mercury 2.5 · 96.0% | GapBest verified | WeightDisplay only | Provider exact |
| DeepSearchQA | Score34.0% | Versus best verified row Best verified: Claude Opus 5 · 95.0% | Gap61 behind | WeightDisplay only | Provider exact |
Knowledge1 row
| Benchmark | Score | Versus best verified row | Gap | Weight | Evidence |
|---|---|---|---|---|---|
| GPQA-DGPQA Diamond | Score79.0% | Versus best verified row Best verified: GPT-6 Astra · 96.0% | Gap17 behind | WeightDisplay only | Provider exact |
Inst. Following1 row
| Benchmark | Score | Versus best verified row | Gap | Weight | Evidence |
|---|---|---|---|---|---|
| IFBenchInstruction Following Benchmark | Score77% | Versus best verified row Best verified: MAI-Thinking-1 · 85% | Gap8 behind | WeightWeighted 70% | Provider exact |
Lineage
The sequence follows explicit supersedes links. A successor's displayed score stays at least 0.1 points above its predecessor; raw benchmark rows do not move. Scores and prices remain blank when the corresponding public row or first-party rate is unavailable.
Feb 24, 2026
Mercury 2Score 42.3 · $0.25 / $0.75
Sep 8, 2026 · you are here
Mercury 2.5Not publicly ranked · $0.04 / $0.15
Base entry
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, but the public leaderboard excludes this profile until enough non-generated benchmark coverage is available. Only published rows appear above.
Mercury 2.5 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 the Inception API as `mercury-2.5`, with 260K context, tunable reasoning, parallel tool calls, and schema-aligned JSON. The launch also lists Baseten and OpenRouter access.
Inception released Mercury 2.5 on September 8, 2026. The launch chart supplies provider-reported GPQA Diamond, IFBench, long-context reasoning, SciCode, DeepSearchQA at ten tool calls, Omniscience accuracy and non-hallucination, and Tau3Bench Telecom results. TerminalBench lacks a version; the GDPval bar uses an unexplained percentage scale. Neither is mapped. Benchmark values are separate from Mercury 2 and Mercury 2.5 Preview.
Mercury 2.5 sits in the Mercury 2.5 family with Mercury 2.5 Preview. Its explicit predecessor is Mercury 2. 5 of 427 tracked benchmark slots currently have displayable evidence. Missing categories stay blank.
Its strongest eligible category is Instruction Following at #53, while its lowest eligible position is Knowledge at #94. a well-rounded choice across a range of tasks.
Model research
The launch rates are temporary
The models page lists standard rates of $0.20 per million input tokens, $0.02 per million cached input tokens, and $0.75 per million output tokens. The 80% launch discount reduces them to $0.04, $0.004, and $0.15. Inception does not state an end date on that page.
The first-party quick start uses the API model ID mercury-2.5. Mercury 2.5 supports adjustable reasoning, parallel tool calls, and JSON constrained to a schema. Mercury 2 remains supported for existing customers.
What the launch chart establishes
Inception reports 79% on GPQA Diamond, 77% on IFBench, and 38% on SciCode. The chart also reports 34% on DeepSearchQA with a ten-tool-call budget. These values belong to Mercury 2.5 and are not copied to Mercury 2 or the earlier Preview record.
The chart’s 96% Tau3Bench result is labeled Telecom in its source note. It should not be compared directly with the older Mercury 2 Banking result. Its TerminalBench bar does not identify a benchmark version, so we leave that result outside the versioned ledger until the setup is documented.
Measure the complete request
Inception reports 1,107 output tokens per second on NVIDIA GPUs. That is a provider throughput claim, separate from the hosted runtime measurements. It does not establish time to first token or the full response latency of a voice application.
Mercury Voice and Mercury Router were announced as separate previews. Their latency and routing claims do not become Mercury 2.5 specifications.
Radar
Full release historyMercury 2.5 release history
Mercury 2.5 released
Inception · Model release
Source confirmed
Radar confirmed these at the source. Use Mercury 2.5 in your work? Explore Radar to follow supported changes and choose your alerts.
Compare Mercury 2.5 with every tracked model411 comparisons
Last updated September 8, 2026. Runtime fields remain blank until a sourced snapshot exists.
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