Gemini 2.5 Flash vs Jamba 1.5 Mini
A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.
- PriceGemini 2.5 Flash
Gemini 2.5 Flash is roughly 1.3× cheaper on output tokens ($0.30 vs $0.40 per 1M).
- Context windowGemini 2.5 Flash
Gemini 2.5 Flash accepts 1.0M tokens vs 256K, 4.1× the room for long documents and codebases.
- BenchmarksTie
No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores.
- ModalitiesGemini 2.5 Flash
Gemini 2.5 Flash supports 3 modalities (text, vision, audio) vs 1 for Jamba 1.5 Mini.
- OpennessJamba 1.5 Mini
Jamba 1.5 Mini ships open weights (Jamba Open Model License); Gemini 2.5 Flash is API-only.
On balance Gemini 2.5 Flash edges ahead, winning 3 of 5 categories against Jamba 1.5 Mini's 1. Gemini 2.5 Flash is roughly 1.3× cheaper on output tokens ($0.30 vs $0.40 per 1M). Gemini 2.5 Flash accepts 1.0M tokens vs 256K, 4.1× the room for long documents and codebases.
No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. They differ in modality coverage, Gemini 2.5 Flash handles text, vision, audio while Jamba 1.5 Mini handles text, which can be the deciding factor before you even look at benchmarks. Jamba 1.5 Mini ships open weights (Jamba Open Model License); Gemini 2.5 Flash is API-only.
Gemini 2.5 Flash is the newer of the two, released 8 months after Jamba 1.5 Mini, which usually means a more recent knowledge cutoff and updated safety post-training. Gemini 2.5 Flash is usually picked for rag and long context workloads, while Jamba 1.5 Mini sees more deployments in long context and summarization. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.
Side-by-side specs
| Spec | Gemini 2.5 Flash | Jamba 1.5 Mini |
|---|---|---|
| Provider | AI21 | |
| Released | Apr 2025 | Aug 2024 |
| Modalities | text, vision, audio | text |
| Context window | 1.0M tokens | 256K tokens |
| Max output | , | , |
| Input · 1M | $0.075 / 1M tokens | $0.20 / 1M tokens |
| Output · 1M | $0.30 / 1M tokens | $0.40 / 1M tokens |
| Knowledge cutoff | 2025-01 | , |
| Open weights | No | Yes (Jamba Open Model License) |
| API available | Yes | Yes |
Pricing at scale
What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.
- Light usage, 100k in / 50k out per day$0.675 vs $1.20
- Heavy usage, 1M in / 500k out per day$6.75 vs $12.00
- RAG workload, 5M in / 200k out per day$13.05 vs $32.40
Light usage, 100k in / 50k out per day: $0.675 vs $1.20 per month, model A comes out ahead. Heavy usage, 1M in / 500k out per day: $6.75 vs $12.00 per month, model A comes out ahead. RAG workload, 5M in / 200k out per day: $13.05 vs $32.40 per month, model A comes out ahead.
Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.
- Gemini 2.5 Flash$0.022
- Jamba 1.5 Mini$0.040
Benchmarks compared
Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.
Gemini 2.5 Flash fits when…
- Cheap and fast
- Long context
- Solid vision
- Cost-sensitive workloads, 1.3× cheaper than Jamba 1.5 Mini on output tokens.
- Long-context tasks, handles 1.0M tokens vs 256K for Jamba 1.5 Mini.
Jamba 1.5 Mini fits when…
- 256k context at small-model price
- Hybrid SSM-Transformer is efficient on long inputs
- Open weights for self-hosting
- Self-hosting and on-prem requirements, open weights (Jamba Open Model License).
Consider Gemini 3 Pro
Google's late-2025 flagship, set new benchmarks on long-context, vision, and reasoning at competitive pricing.
Frequently asked
Is Gemini 2.5 Flash or Jamba 1.5 Mini cheaper?
Gemini 2.5 Flash is cheaper at $0.30 / 1M tokens per million output tokens, vs $0.40 / 1M tokens for Jamba 1.5 Mini.Which has the larger context window?
Gemini 2.5 Flash accepts 1.0M tokens vs 256K for Jamba 1.5 Mini.Is Gemini 2.5 Flash or Jamba 1.5 Mini better for coding?
Both Gemini 2.5 Flash and Jamba 1.5 Mini are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.Are either of these models open source?
Jamba 1.5 Mini ships open weights (Jamba Open Model License). Gemini 2.5 Flash is API-only.When were Gemini 2.5 Flash and Jamba 1.5 Mini released?
Gemini 2.5 Flash was released by Google on 2025-04-09. Jamba 1.5 Mini was released by AI21 on 2024-08-22.
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