Coding & apps
Respan
Trace and evaluate AI agents, manage prompts and call models through one gateway. Span-01 detects conversation behaviors; Span-02 returns choices, scores and numbers from text, JSON and images.
Start for free
Free
Feature quotas and conditions
Free plan
No credit card required; 7-day log retention, 1 workspace and unlimited seats.
Upgrade to Team for additional logs and scores.
View on official sitespan-01 Lite API
Span-01 access must be enabled for the organization.
Wait for the 00:00 UTC daily reset or use span-01-pro.
View on official siteSpan-02 open weights
Feature quotas and conditions
At most 4 images across images and assets; PNG/JPEG, up to 16 MiB each.
Number answers are at most 32 tokens.
Free weights and engine; bring an RTX 5090 or RTX PRO 6000 and use the included Rust/CUDA engine.
View on official sitePlans and usage
Team
Annual billing
Feature quotas and conditions
Renews automatically; cancellation takes effect at the end of the paid term.
30-day log retention.
Additional logs cost $8/100,000; scores $1/1,000; members $15 each.
View on official siteEnterprise
Feature quotas and conditions
Contact sales for custom usage, retention, SAML SSO, SLAs and dedicated support.
View on official sitespan-01 API
Billed by input tokens
Span-01 access must be enabled for the organization.
Input tokens use Respan credits; output is free.
View on official siteSpan-02 API
Feature quotas and conditions
Number answers are at most 32 tokens.
Usage-based billing
Uses Respan credits; accepts text, JSON and up to 4 images.
View on official sitePlatform plans, additional logs and scores, model inference and add-ons have separate charges.
Additional usage rates
| Available plans | Quantity | Price | Terms |
|---|---|---|---|
| Enterprise / Free / Span-02 API / span-01 API / Team | 1 USD gateway balance | $1.00 / USD gateway balance | Validity: 12 months Add $10–$2,000 per purchase. |
| Enterprise / Free / Span-02 API / span-01 API / Team | 10 USD gateway balance | $10.00 / 10 USD gateway balance | Validity: 12 months |
| Enterprise / Free / Span-02 API / span-01 API / Team | 200 USD gateway balance | $200.00 / 200 USD gateway balance | Validity: 12 months |
| Enterprise / Free / Span-02 API / span-01 API / Team | 50 USD gateway balance | $50.00 / 50 USD gateway balance | Validity: 12 months |
| Team | 100,000 logs | $8.00 / 100,000 logs | |
| Team | 1,000 scores | $1.00 / 1,000 scores | |
| Team | 1 seats | $15.00 / seats |
Choose your workflow
Developers and teams needing agent tracing, evaluations, prompt management and model routing.
Create a free Respan account and API key. Start with a tracing SDK; add a balance in Gateway → Credits before using paid gateway models or Span-02. Team and Enterprise can use their own provider keys.
Regional coverage is not specified.
Free
Agent tracing
IncludedBatch export (JSONL, CSV)
Not includedError monitoring
Not includedKey vault (BYOK)
Not includedUnified endpoint (1,000+ models)
IncludedTask-aware automatic model selection
IncludedSelects by task context, capabilities and cache-aware costs, with thread_identifier continuity; billed at the serving model's rates.
SAML SSO
Not includedDatasets and LLM evaluations
IncludedPrompt versioning and experiments
IncludedTeam
Agent tracing
IncludedBatch export (JSONL, CSV)
IncludedError monitoring
IncludedKey vault (BYOK)
IncludedUnified endpoint (1,000+ models)
IncludedTask-aware automatic model selection
IncludedSelects by task context, capabilities and cache-aware costs, with thread_identifier continuity; billed at the serving model's rates.
SAML SSO
Not includedDatasets and LLM evaluations
IncludedPrompt versioning and experiments
IncludedEnterprise
Agent tracing
IncludedBatch export (JSONL, CSV)
IncludedError monitoring
IncludedKey vault (BYOK)
IncludedUnified endpoint (1,000+ models)
IncludedTask-aware automatic model selection
IncludedSelects by task context, capabilities and cache-aware costs, with thread_identifier continuity; billed at the serving model's rates.
SAML SSO
IncludedDatasets and LLM evaluations
IncludedPrompt versioning and experiments
Includedspan-01 Lite API
Daily free access cap
Limited / conditionalThe daily free cap resets at 00:00 UTC; a fixed quantity is not disclosed.
Span-01 access must be enabled for the organization; contact Respan if access is refused.
Conversation behavior probability classification
IncludedInputs are text conversations; each behavior returns present, absent and not_observable probabilities.
Span-01 access must be enabled for the organization; contact Respan if access is refused.
span-01 API
Conversation behavior probability classification
IncludedInputs are text conversations; each behavior returns present, absent and not_observable probabilities.
Span-01 access must be enabled for the organization; contact Respan if access is refused.
Span-02 API
Span-02 text and image decisions
API · IncludedSpan-02 open weights
Span-02 text and image decisions
Span-02 local API · IncludedMore capabilities and limits
Minimum age · 13 years
Ages 13 and up; users below the age of majority in their jurisdiction need a parent's or guardian's consent and direct supervision.
Taxes · Sales tax is added where required; payments are in USD.
Data retention · Third-party AI providers process inputs and outputs when used; account information follows purpose-based and legal retention requirements.
Models and access
Span-02 open weights · Span-02 local weights use Apache-2.0. Use the included Rust/CUDA engine on a Blackwell RTX 5090 or RTX PRO 6000; default settings use about 28 GB of GPU memory. Docker requires a CUDA 12.9-capable driver (R575+) and NVIDIA Container Toolkit.
Span-02
The supplied launch.sh configuration allows 131,072 tokens per question, including images and thought.
Running the engine with its raw default flags allows 32,768 tokens per question.
span-01 Lite
Span-01 access must be enabled for the organization; contact Respan if access is refused.
span-01
Span-01 access must be enabled for the organization; contact Respan if access is refused.
Model rates
| Model / tier | Input | Cache read | Cache write | Output |
|---|---|---|---|---|
| Span-02 | 0.01 | — | — | 0 |
| 0.02 | — | — | 0 | |
| span-01 Lite | 0 | — | — | 0 |
| span-01 | 0.02 | — | — | 0 |
Official sources
2026-10-16