o3-deep-research vs Llama-3.1-8B-Instruct
Llama-3.1-8B-Instruct comes out ahead, 62 to 24 on our weighted score, and it is the cheaper option too.
OpenAIo3-deep-research
24/100- ECI—
- Price$9.00 / $36.00
- Context200K
- Our pick
MetaLlama-3.1-8B-Instruct
62/100- ECI116.4
- Price$0.06 / $0.08
- Context128K
Add a model
Make it a three-way comparison.
Llama-3.1-8B-Instruct is our pick
Llama-3.1-8B-Instruct is the better all-round choice, scoring 62/100 against o3-deep-research (24). It leads on price. o3-deep-research wins on inputs & features and context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceLlama-3.1-8B-InstructLlama-3.1-8B-Instruct $0.065 · o3-deep-research $15.75 per 1M tokens (3:1 blend)
- Longest contexto3-deep-researcho3-deep-research 200,000 · Llama-3.1-8B-Instruct 128,000 tokens
- Widest inputso3-deep-researcho3-deep-research: Text, Images · Llama-3.1-8B-Instruct: Text
- Self-hostingLlama-3.1-8B-InstructPublishes downloadable weights
| Measure | Weight | o3-deep-research | Llama-3.1-8B-Instruct |
|---|---|---|---|
| Price | 50% | 0 | 100 |
| Inputs & features | 30% | 60 | 25 |
| Context window | 20% | 32 | 24 |
| Overall | 100% | 24/100 | 62/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | o3-deep-researchOpenAI | Llama-3.1-8B-InstructMeta |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | 116.4 |
| ECI rank | — | #162 of 165 |
| GPQA DiamondGraduate-level science questions | — | 27.0% |
| OTIS Mock AIME 2024–2025Competition mathematics | — | 1.7% |
| Price per million tokens | ||
| Input | $9.00 | $0.06 (best) |
| Output | $36.00 | $0.08 (best) |
| Cached input | — | — |
| Blended (3:1) | $15.75 | $0.065 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 1 providers | Median of 17 providers |
| Limits | ||
| Context window | 200,000 tokens (best) | 128,000 tokens |
| Max output | 100,000 tokens (best) | 4,096 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yes | No |
| Tool calling | Yes | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Proprietary | Open |
| API model ID | — | — |
| API providers | 1 | 18 (best) |
| Released | Jun 26, 2025 | Jul 23, 2024 |
| Knowledge cutoff | May 2024 | Dec 2023 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- o3-deep-research$162.00
- Llama-3.1-8B-Instruct$0.76
Which should you choose?
Which is better: o3-deep-research or Llama-3.1-8B-Instruct?
Llama-3.1-8B-Instruct is the better all-round choice, scoring 62/100 against o3-deep-research (24). It leads on price. o3-deep-research wins on inputs & features and context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, o3-deep-research or Llama-3.1-8B-Instruct?
Llama-3.1-8B-Instruct is cheaper at $0.06 input / $0.08 output per million tokens (median across 17 API providers). o3-deep-research costs $9.00 input / $36.00 output per million tokens (median across 1 API provider). At a typical mix of three input tokens to one output token, that is $0.065 per million tokens for Llama-3.1-8B-Instruct versus $15.75 for o3-deep-research (242× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. o3-deep-research has not been scored yet and Llama-3.1-8B-Instruct has an ECI of 116.4.
Which is better for coding?
There are no published SWE-bench Verified results for o3-deep-research and Llama-3.1-8B-Instruct yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
o3-deep-research has the largest context window at 200,000 tokens, against 128,000 for Llama-3.1-8B-Instruct. Maximum output per response: o3-deep-research up to 100,000, Llama-3.1-8B-Instruct up to 4,096 tokens.
Which can read images, PDFs, audio or video?
o3-deep-research accepts text and images; Llama-3.1-8B-Instruct accepts text. o3-deep-research handles the widest range of inputs.
Are any of these open source?
Llama-3.1-8B-Instruct publishes its weights and can be self-hosted; o3-deep-research is proprietary.
Which is newer?
o3-deep-research is the newest, released Jun 26, 2025. Llama-3.1-8B-Instruct came out Jul 23, 2024. Knowledge cutoff: o3-deep-research May 2024, Llama-3.1-8B-Instruct Dec 2023.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
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