Mercury 2.5 is a large language model from Inception, released on September 8, 2026. It accepts text input.

When was Mercury 2.5 released?

Inception released Mercury 2.5 on September 8, 2026.

How much does Mercury 2.5 cost?

Mercury 2.5 costs $0.20 per 1M input tokens and $0.75 per 1M output tokens through the Inception API. Cached input costs $0.02 per 1M tokens. Prices are from Inception's official pricing as of October 5, 2026.

What is Mercury 2.5's context window?

Mercury 2.5 has a 260K-token context window and can generate up to 66K output tokens.

How does Mercury 2.5 score on benchmarks?

Mercury 2.5 has 1 cited benchmark score, including Terminal-Bench 4.0 (Vals AI) 0%. Each score links to its source.

Mercury 2.5

Inception·Pending·Released 2026-09-08text

Context260k

Max output65.536k

Input / 1M$0.2 ↗

Output / 1M$0.75 ↗

Cached in$0.02

Benchmarks1

Benchmarks

Cited public sources · rank is exact-benchmark, apples-to-apples

Terminal-Bench 4.0 (Vals AI)

#39/400% ↗

Compare

vs Gemini 4 Argon vs GPT-6.1 Sol vs Claude Sonnet 5.5 vs Muse Spark 1.3 vs GPT-6 Sol vs GPT-6 Luna vs Claude Opus 5.5 vs GPT-6 Astra

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Mercury 2.5 FAQ

What is Mercury 2.5?: Mercury 2.5 is a large language model from Inception, released on September 8, 2026. It accepts text input.
When was Mercury 2.5 released?: Inception released Mercury 2.5 on September 8, 2026.
How much does Mercury 2.5 cost?: Mercury 2.5 costs $0.20 per 1M input tokens and $0.75 per 1M output tokens through the Inception API. Cached input costs $0.02 per 1M tokens. Prices are from Inception's official pricing as of October 5, 2026.
What is Mercury 2.5's context window?: Mercury 2.5 has a 260K-token context window and can generate up to 66K output tokens.
How does Mercury 2.5 score on benchmarks?: Mercury 2.5 has 1 cited benchmark score, including Terminal-Bench 4.0 (Vals AI) 0%. Each score links to its source.

Access Mercury 2.5 and every other model through one endpoint with automatic failover: Respan gateway.